Yellow gentian (Gentiana lutea). The dried root is the part used.

Herbs & Botanicals · Herbs · Bitter root tonic with traditional use and very little human research

Gentian

Q: What is gentian root used for?

Gentian root is a bitter tonic used in Europe for temporary loss of appetite and mild indigestion, with fullness and bloating. The EU accepts these uses only as traditional ones, based on long use, not on controlled trials. It is also in some bitter liqueurs and, with four other plants, in sinus products. If symptoms last more than 2 weeks, see a doctor.

Q: Does gentian really help appetite or indigestion?

We cannot say. No controlled trial of gentian root alone has tested appetite (insufficient). For mild indigestion there is one open study of 205 people with no placebo group, reporting a 68% average improvement (very low). With no comparison group, it cannot separate a real effect from natural recovery or expectation.

Q: Is yellow gentian the same as Chinese gentian (long dan cao)?

No. Long dan cao comes from Gentiana scabra, G. manshurica, G. triflora or G. rigescens, and qin jiao from G. macrophylla and relatives. They are different plants used in a different tradition. They share gentiopicroside, but results for yellow gentian (Gentiana lutea) should not be assumed for them, and the reverse.

Q: Can gentian be confused with a poisonous plant?

Yes. White hellebore (Veratrum album) has often been mistaken for yellow gentian, especially before flowering. Gentian leaves are opposite and its flowers yellow; Veratrum leaves alternate and its flowers are white. Poisoning from home-made gentian wine, spirit or tea has caused vomiting, a slow heartbeat (as low as 35 beats a minute) and low blood pressure. All recovered with hospital care in the reports read. Never use wild-picked or home-made roots, and call emergency services if you feel ill after such a drink.

Q: Is gentian safe in pregnancy or breastfeeding?

It is not recommended. The EU says its safety has not been established, no fertility data exist, and tests on reproduction were not done. We found no human or animal study to show it is safe.

Q: Can children take gentian?

Not under 18, according to the EU monograph, because there are no adequate data. Tinctures and liqueurs also contain alcohol.

Q: Is gentian safe with stomach ulcers or acid reflux?

Ask a doctor first. Gentian is used because bitters raise saliva and stomach juice, and in rat cells and rats it raised acid-linked secretion. The first EU monograph (2009) listed peptic ulcer as a contraindication; the 2018 revision lists only allergy. No study tested gentian in people with ulcers or reflux, so the caution rests on how it works.

Q: Does gentian cause headaches or other side effects?

Sometimes. In the one open study of 205 people, 2.4% reported flatulence, soft stools, stomach cramps or nausea, and one person had a headache; EMA says these cannot be tied to the extract. The 2009 EU monograph said headache may occur. The 2018 monograph lists no known undesirable effects. Rare reports include a fast heartbeat, itching and one case of high blood pressure.

Q: Does gentian help sinusitis?

The evidence is for Sinupret, a five-plant mix that includes gentian, not for gentian alone. Several trials in acute sinusitis favour the mix over placebo or no treatment (low), but a large trial in chronic sinusitis missed its main target (very low). Many trials are open-label or likely industry-linked. See a doctor for severe or lasting sinus symptoms.

Q: Does gentian interact with medicines or iron?

The EU monograph says no interactions have been reported, but gentian has been studied very little. In theory it could oppose acid-lowering medicines, and a small study found a brief blood-vessel reflex, so tell your doctor if you have high blood pressure. Tinctures contain alcohol. No study we read shows that gentian changes iron absorption; traditional claims that it helps iron are unverified. Do not use it to treat anaemia.

Gentiana lutea L. · also called Yellow gentian, great yellow gentian, bitterwort, gentian root, genciana amarilla (Spanish), gentiane jaune (French), Gelber Enzian (German), genziana maggiore (Italian)

Yellow gentian is a tall mountain plant whose very bitter root is used as a bitter tonic before meals for loss of appetite and mild indigestion. The EU accepts it only as a traditional herbal medicine. No controlled trial of the root alone has tested these uses (appetite is insufficient, indigestion very low). A five-plant sinus mix that includes gentian is rated low for acute sinusitis. Gentian is not recommended in pregnancy, breastfeeding or under 18, and anyone with an ulcer or reflux should ask a doctor first. It must not be confused with white hellebore (Veratrum album), a poisonous look-alike, or with Chinese gentian (long dan cao).

General information, not medical advice. Last substantive update October 25, 2026 · Not medically reviewed. A named clinician has not signed off on this page. How this page is made

Get your Gentian today. Order now from Amazon and have it delivered to your door.Shop Gentian on AmazonSupport our free guides: as an Amazon Associate we earn from qualifying purchases.

About Gentian

Yellow gentian (Gentiana lutea) is a tall mountain plant whose very bitter root is used in Europe as a bitter tonic taken before meals for loss of appetite and mild indigestion. The EU accepts it only as a traditional herbal medicine; no controlled trial of the root on its own has tested these uses, so the evidence is insufficient or very low. The sinus research is on a five-plant branded mix (Sinupret) that includes gentian, rated low, and cannot be credited to gentian alone. Gentian is not recommended in pregnancy, breastfeeding or under 18; ask a doctor first with stomach ulcers, reflux or high blood pressure. The big safety point is a poisonous look-alike, white hellebore (Veratrum album), which has caused poisoning when mixed into home-made gentian wine, spirit or tea. Wild gentian is protected and over-collected in places. It is a different plant from Chinese gentian (long dan cao). For amounts, ask a doctor or pharmacist.

What it is

Yellow gentian (Gentiana lutea L.) is a tall plant of the gentian family, 1 to 2 metres high, with large paired leaves and yellow flowers. It grows in mountain meadows in central and southern Europe. The root, which can be over a metre long, is dug, dried and cut for medicine, and it is among the most bitter plant materials known.

Do not mix it up with other plants. Chinese gentian (long dan cao) and large-leaf gentian (qin jiao) come from other Gentiana species used in Chinese medicine. White hellebore (Veratrum album) is a poisonous look-alike from a different plant family. The research here is for Gentiana lutea root unless a line says otherwise.

^{31 37 32 30 27 2}

Traditional and current uses

Gentian root has long been taken in Europe as a bitter stomach tonic for loss of appetite, a feeling of fullness and flatulence. The German Commission E listed these uses in 1985 (known here through the EU report). The EU herbal committee accepts it only as a traditional herbal medicine for temporary loss of appetite and mild indigestion, based on at least 30 years of use, and says to see a doctor if symptoms last more than 2 weeks. It is also an ingredient of bitter liqueurs and of mixed digestive and sinus products.

^{29 27 4 10}

What is in it and how it works

The bitterness comes from secoiridoids: gentiopicroside (about 2 to 6% of the root) and the extremely bitter amarogentin. The root also holds yellow xanthones (gentisin, isogentisin), sugars, and a little volatile oil. In bitter-tonic theory, the taste triggers a reflex that raises saliva, stomach juice and bile. A small human study found a taste-linked blood-vessel reflex, and a 2% gentian tincture raised saliva in volunteers. Stomach-acid findings are from rat cells and rats.

Two xanthones were mutagenic in a bacterial test, which is one reason the EU did not recommend a list entry. This has not been tested in people or in the tea or tincture itself. Other lab work (airway cell inflammation, radiation damage, H. pylori, mouse liver) is early and cannot be assumed to help people.

^{12 4 9 24 33 35 11 21 8 27 38}

What the research shows

Little human research exists on gentian root alone. For appetite there is no controlled trial (insufficient). For mild indigestion there is one open study of 205 people with no placebo group (very low). Saliva and stomach-juice effects and a blood-vessel reflex have been shown in small studies of healthy volunteers (very low).

For sinus infections, the trials tested the five-plant mix Sinupret. In acute sinusitis several trials, including a 386-person placebo-controlled trial, favour it (low). In chronic sinusitis a 929-person trial missed its main target (very low). A single case report of hiccups, and cell and animal studies on inflammation, radiation damage, liver injury and H. pylori, are rated insufficient. Many sinus trials are open-label or likely linked to the maker.

^{15 10 6 16 13 14 19 7 23 9 21 8 20 1 41 27}

At a glance

Traditional uses history, not proof

European medicine: a bitter stomach tonic for loss of appetite, fullness and flatulence, listed by the German Commission E in 1985 and accepted by the EU as a traditional use.
Bitter liqueurs and schnapps in the Alps, where the root gives the bitter taste.
Combination products: with other bitters for digestion, and with four other plants in sinus products such as Sinupret.

Studied for research

Loss of appetite, insufficient
Mild indigestion, fullness and bloating, very low; saliva and stomach juice and a blood-vessel taste reflex, very low
Acute sinusitis (five-plant mix), low; chronic sinusitis (five-plant mix), very low
Hiccups (one case), airway inflammation, antioxidant effects, liver and H. pylori (lab and animal), insufficient

Main compounds

Gentiopicroside, the main bitter compound, about 2 to 6% of the root
Amarogentin, one of the most bitter substances known, in tiny amounts
Xanthones (gentisin, isogentisin), which colour the root yellow and were mutagenic in a bacterial test

Common forms

Dried cut root as tea
Dry extract capsules
Tincture and liquid extract (contain alcohol)
Bitter liqueurs

Research links: EU herbal monograph on gentian root (EMA, 2018) · EU assessment report on gentian root (EMA, draft 2018) · EU first-version monograph, superseded (EMA, 2009) · National Red List of North Macedonia: Gentiana lutea · Research Library · Genes & Biomarkers Library

The plant and its history

Accepted scientific name: Gentiana lutea L. (yellow gentian, great yellow gentian, bitterwort)
Naming authority: Linnaeus, Sp. Pl.: 227 (1753) (GBIF). Accepted species name in GBIF and NCBI.
Synonyms: Swertia lutea (L.) Vest (the only synonym listed by GBIF on 2026-10-25); Accepted subspecies in GBIF include Gentiana lutea subsp. lutea, subsp. symphyandra, subsp. vardjanii and subsp. aurantiaca.
Common names: Yellow gentian (English); Great yellow gentian (English); Bitterwort (English); Gentian root (English); Gelber Enzian / Enzianwurzel (German); Gentiane jaune / grande gentiane (French); Genciana amarilla / genciana mayor (Spanish); Genziana maggiore (Italian)
Botanical family: Gentianaceae (gentian family), order Gentianales.
Classification: Plantae > Tracheophyta > Magnoliopsida > Gentianales > Gentianaceae > Gentiana > Gentiana lutea
Native range: Mountains of central and southern Europe (EU assessment, citing handbooks); it grows naturally in France, Spain and the Balkan mountains.
Habitat: Grassy alpine and sub-alpine pastures, usually on limestone (calcareous) soils (EU assessment).
What the plant looks like: Roots: The main root can be over 1 metre long and weigh up to 7 kg fresh. The dried, cut root is the medicinal part: pieces 10 to 40 mm thick, with a characteristic smell and a strong, lasting bitter taste (European Pharmacopoeia, as quoted by EMA). Bitter compounds are 2 to 8% of the root, mostly in the bark (cortex).; Stems: Plant grows 1 to 2 m tall (EU assessment).; Leaves: Broad, lance-shaped to oval, 10 to 30 cm long and 4 to 12 cm wide, growing in opposite pairs on the stem (EU assessment; Festa 1996 abstract).; Flowers: Yellow; the corolla is split almost to the base into 5 to 7 narrow petals (EU assessment).; Fruit: Not described in the sources read.
Cultivation: The plant is under wildlife protection, so material is mostly grown on farms in Germany and France (EU assessment).
Harvest and processing: Bitter substances peak in spring and fall as sugar content rises toward July. The root must be dried right after harvest to avoid fermentation, which ruins the extract and changes the colour (EU assessment). The Commission E describes the drug as dried, unfermented root and rhizome with a bitter value of at least 10,000.
Look-alikes and adulterants: Name: White hellebore / false hellebore (Veratrum album L.), family Melanthiaceae; Note: Poisonous and often mistaken for yellow gentian before flowering because both are tall plants of mountain meadows. Gentian leaves are opposite and its flowers yellow; Veratrum leaves alternate along the stem and its flowers are white (EU assessment; Festa 1996). GBIF lists Veratrum album as a different family (Melanthiaceae). Poisoning cases are in the Safety tab.; Name: Other Gentiana species; Note: There are over 400 species in the genus (Ponticelli 2023). Their roots differ in chemistry and use, and results for one cannot be assumed for another. The research on this page is for Gentiana lutea root unless stated.; Name: Chinese gentian, long dan cao (Gentiana scabra, G. manshurica, G. triflora, G. rigescens); Note: Used in traditional Chinese medicine for the liver and gallbladder; a different tradition and different species. All four share gentiopicroside as the main bitter compound (EU assessment). GBIF accepts G. scabra and G. manshurica as separate species.; Name: Large-leaf gentian, qin jiao (Gentiana macrophylla, G. straminea, G. crassicaulis, G. dahurica); Note: Used in traditional Chinese medicine, described as acting on the stomach, liver and gallbladder (EU assessment); a separate herb. Not the same as European gentian root. GBIF accepts G. macrophylla as a separate species.
Sustainability and conservation: Global status: a search summary says IUCN Least Concern (not verified at the IUCN page). Regional: North Macedonia rates the local subspecies Vulnerable (assessed November 2019), with over-harvesting for medicine as the main threat; search summaries say Italy rates it Near Threatened. The EU assessment says the plant is under wildlife protection. Annex V of the EU Habitats Directive and Annex D of the EU Wildlife Trade Regulation list it (stated on the North Macedonia page). Choose farm-grown material.

Traditional use and history history, not clinical proof

Tradition or era	Documented use	Source
Europe: bitter stomach tonic, 20th-century handbooks	Madaus (1938) described gentian root as a bitter stomach tonic and stimulant, also used for intermittent fever attacks; later handbooks (Wichtl 2002; Blaschek 2016) list loss of appetite, gastric complaints and flatulence. These are as quoted by the EU assessment report; the originals were not read.	s-ema-ar-gentian-2018
Germany: Commission E monograph (1985, revised 1990)	Digestive disorders such as loss of appetite, a feeling of fullness and flatulence; tincture, fluid extract, dry extract and tea. NOT verified at the source; known from the EMA assessment report.	s-ema-ar-gentian-2018
European Union: HMPC monograph (2009, revised 2018)	Accepted as a traditional herbal medicine only, for temporary loss of appetite and mild dyspeptic or gastrointestinal disorders, based on at least 30 years of use. The committee did not recommend an EU list entry because genotoxicity data are missing.	s-ema-hmpc-gentian-2018
Europe: combination products	Gentian root is an ingredient of herbal combinations for digestive complaints (with rhubarb, boldo, zedoary and other bitters) and of products for the nose and sinuses (such as Sinupret); a systematic review says Sinupret has been used in Germany for 70 years.	p16645287
China: other gentian species	Long dan cao (G. scabra and relatives) is used for the liver and gallbladder, and qin jiao (G. macrophylla and relatives) is used for other conditions. Different plants from European gentian root (EU assessment).	s-ema-ar-gentian-2018
Alpine drinks	The root is a bitter ingredient of liqueurs and schnapps. Chemical tests show liqueurs vary widely and clear spirits can contain no measurable bitter compounds.	p35695390

Traditional use shows how a plant was used. It does not show that a supplement works or is safe today.

What is inside, and how it may work

What the plant contains and how those compounds act in cells and animals. Laboratory and animal mechanisms are not proven effects in people.

Main compounds

Compound	Family	Where it is concentrated	Activity studied	Level of evidence
Gentiopicroside (gentiopicrin) PubChem 88708	secoiridoid glycoside	Root bark 2.1 to 5.6% in 13 root batches (p35695390); 1.85 to 3.97% in 20 samples (p25529701). Bitter value 12,000 (EU assessment).	The main bitter compound. Studied in cells and animals for liver, digestive, inflammatory and microbial effects (review). Human data for the purified compound were not found. ^{4 12 1 38 27}	Animal research
Amarogentin PubChem 115149	secoiridoid glycoside	Root 0.025 to 0.4% (EU assessment) or 0.01 to 0.07% (p25529701); the two sources differ. Bitter value 58 million, called the most bitter substance known (EU assessment).	Responsible for much of the bitterness in very small amounts. ^{12 27 38}	Laboratory research
Swertiamarin PubChem 442435	secoiridoid glycoside	Root 0.08 to 0.30% (p25529701)	Minor bitter compound; reported only occasionally in the EU report. ^{12 38}	Other
Sweroside PubChem 161036	secoiridoid glycoside	Root 0.05 to 0.35% (p25529701)	Minor compound; dominates in some liqueurs. ^{12 4 38}	Other
Loganic acid PubChem 89640	iridoid	Root 0.11 to 1.30% (p25529701)	Marker compound; no specific effect shown. ^{12 8 38}	Other
Gentisin PubChem 5281636	xanthone	Root (gives the yellow colour) Xanthones up to about 1% of the root (EU assessment)	Mutagenic in the Ames bacterial test (6.94 revertants per microgram). ^{11 27 38}	Laboratory research
Isogentisin PubChem 5281640	xanthone	Root 0.03 to 0.48% (p25529701)	Mutagenic in the Ames test (19.1 revertants per microgram). ^{11 12 38}	Laboratory research
Gentiobiose and gentianose (sugars) PubChem 20056559	di- and trisaccharides	Root Carbohydrates are 30 to 55% of the dried root (EU assessment)	Gentianose breaks down to sweeter sucrose or bitter gentiobiose during drying. ^{27 38}	Other
Rosmarinic acid PubChem 5281792	phenolic acid	Root (aqueous extract)	Detected with gentiopicroside, loganic acid, sweroside and swertiamarin in a root extract used in a radiation cell study. ⁸	Laboratory research
Isovitexin (flavonoid) PubChem 162350	flavone C-glycoside	Root (per EU report)	In diabetic rats, root extract and isovitexin had anti-atherosclerotic activity (Kesavan 2016, as summarised by EMA; not read). ^{27 38}	Animal research
Volatile oil and others	essential oil, phytosterols, triterpenes	Root 0.1 to 0.2% volatile oil (EU assessment)	Give the liqueur flavour. ²⁷	Other

Mechanisms, receptors and pathways

Target or pathway	Gene or receptor	What was found	Level
Bitter-taste reflex (cephalic phase)	Bitter taste receptors (TAS2R family) in mouth and gut; sympathetic nerves	In 12 healthy people, gentian root in water, not capsules, raised resistance of small blood vessels and lowered cardiac output, a sympathetic taste reflex. EMA proposes that bitters raise saliva, stomach juice and bile through taste nerves; the exact mechanism is not finally known. ^{9 27}	Human data
Stomach acid secretion	Parietal (acid) cells	An aqueous gentian root extract raised an acid-production marker 1.7-fold in cultured rat stomach cells; in rats gentian extract raised gastric secretion (summarised by EMA). ^{33 35}	Laboratory research
Saliva secretion	Taste nerves to salivary glands	Gentian tincture 2% raised salivary secretion in 24 healthy volunteers over 30 minutes (summarised by EMA). ²⁴	Human data
Inflammation signals in airway cells	IL6, CXCL8 (IL-8), IL33 genes	A water root extract reduced IL-6 and IL-8 secretion and gene activity in LPS-stimulated human bronchial cells. ²¹	Laboratory research
Chloride secretion and cilia in sinus lining	CFTR and TMEM16A chloride channels	Sinupret (a five-plant mix, not gentian alone) activated these channels and increased ciliary beating in human sinus cells. ²³	Laboratory research
Oxidative and DNA damage after radiation	Base excision repair genes	Root extract pretreatment reduced oxidative and genomic damage in irradiated human white blood cells. ⁸	Laboratory research
Bacterial mutation (Ames test)	Salmonella TA100 DNA	Gentisin and isogentisin were mutagenic with liver-enzyme activation. ¹¹	Laboratory research
Liver injury	Not stated	Gentiopicroside before carbon tetrachloride reduced liver injury in mice (30-60 mg/kg a day, as summarised by EMA). ³⁴	Animal research
Helicobacter pylori growth	Bacterial growth	A methanol gentian root extract blocked growth of 15 H. pylori strains at 100 micrograms/mL in a dish (as summarised by EMA). ³⁶	Laboratory research

Absorption, metabolism and elimination

Absorption: No human blood-level data for gentian root or its preparations (EU assessment: "no data available").
Distribution: No human data found.
Metabolism: In a dish, many strains of human gut bacteria changed gentiopicroside into other compounds (summarised by EMA). Human metabolism of the whole root was not found.
Elimination: No human data. In rats the EU report lists half-times of roughly 3 to 6 hours for gentiopicroside, depending on how it was given; the original was not read.
Bioavailability: Not established in humans. In rats, at the same gentiopicroside dose, blood exposure differed more than threefold between a Gentiana decoction (70.0), the pure compound (32.7) and a mixed formula (19.1 ug h/mL), showing how much the preparation matters. The decoction species is not stated and may not be G. lutea.

^{27 40 26}

Isolated compounds versus whole extracts

The EU treats the whole preparation, with all its constituents, as the active principle of gentian root, not any single compound. Yet most modern research is on purified gentiopicroside or on other Gentiana species from Asia, and the EU report says single-compound data are not directly relevant to the herbal preparation. The two xanthones with the Ames signal are in the whole root, while bitterness comes largely from the secoiridoids. The sinus data are for a five-plant mix.

Nutritional composition

Dried gentian root is 30 to 55% carbohydrate by weight (EU assessment), but the amounts taken are tiny and gentian is not used as a source of vitamins or minerals. No nutrient table was built. A traditional idea that gentian helps iron absorption was not backed by any study read.

10benefits and uses looked at

41studies and sources checked

Low certaintybest evidence rating found

8lab markers tracked in trials

1 low certainty4 very low certainty5 not enough evidence

What was looked at

The 10 benefits and uses checked for Gentian, each with how strong the evidence is. Tap one to open it.

Loss of appetite: bitter tonic taken before mealsNot enough evidence
Mild indigestion, fullness and bloating (dyspepsia)Very low certainty
Stimulating saliva and stomach juice (the bitter reflex)Very low certainty
Blood-vessel response to bitter gentian water (healthy volunteers)Very low certainty
Acute sinus infection (rhinosinusitis): Sinupret five-plant combinationLow certainty
Long-lasting sinus inflammation (chronic rhinosinusitis): Sinupret extractVery low certainty
Hiccups after anaesthesia (one case report)Not enough evidence
Airway inflammation (human lung-lining cells in a dish)Not enough evidence
Protecting cells from oxidative and radiation damage (cell study)Not enough evidence
Liver protection and killing germs (animal and lab only)Not enough evidence

Lab markers tracked in the studies

Saliva productionStomach acid productionResistance of small blood vessels after a bitter drinkDigestive symptom improvement (doctor rating)Sinus symptom score (Major Symptom Score)Antibiotic prescribingInflammation signals IL-6 and IL-8 in airway cellsMucus-clearing indicators in sinus cells

What is Gentian good for?

The main proposed uses and how strong the human evidence is for each. "Low" means small or mixed studies, "very low" means a single small or open study, and "insufficient" means there is not enough to judge. Almost all of this evidence is traditional use, small studies of healthy people, or lab work. Sinus results are for a five-plant mix, not gentian alone. For amounts, ask a doctor or pharmacist.

Loss of appetite: a bitter tonic before mealsNot enough evidenceThis is gentian's classic use and the one the EU accepts, but only as a traditional herbal medicine. No controlled trial of gentian root alone has tested appetite. The case rests on centuries of use and on how bitter tastes trigger saliva and stomach juice. The EU monograph says to see a doctor if symptoms last more than 2 weeks. Lasting loss of appetite or weight loss needs a doctor's look. Mild indigestion, fullness and bloatingVery low certaintyThe best human data are one open study of 205 people with mild digestive complaints, who took a gentian root dry extract for 15 days; the EU summary reports an average improvement of 68% and doctors rated results good or excellent in 86%. With no placebo group, this cannot separate a real effect from natural recovery, and the EU says the study only supports plausibility. A mixed-herb trial that included gentian beat placebo, but gentian was only one part. Stimulating saliva and stomach juice (the bitter reflex)Very low certaintyA 2% gentian tincture raised saliva for about 30 minutes in 24 healthy volunteers (as summarised by the EU). In rat stomach cells and in rats, gentian extract raised acid-linked secretion. This is a body response, not a proven benefit, and it is the reason to ask a doctor first if you have an ulcer, reflux or gastritis. Blood-vessel response to bitter gentian waterVery low certaintyIn 12 healthy volunteers, gentian root stirred into water briefly tightened small blood vessels and lowered the heart's output per beat; capsules did not. This suggests a taste reflex. It is a physiology finding, not a treatment, and no one has tested it in people with blood pressure problems. Acute sinus infection: the Sinupret five-plant mix (combination)Low certaintyGentian root is one of five plants in the branded mix Sinupret (with primula flower, sorrel, elderflower and verbena). Several trials, including a 386-person placebo-controlled trial, found milder sinus symptoms. A review of about 900 people found add-on benefit to antibiotics. These results are for the mix, not gentian alone, and many trials are open-label or likely industry-linked. Long-lasting sinus inflammation: Sinupret extract (combination)Very low certaintyA 929-person, 12-week trial of the five-plant extract was not better than placebo on its planned main outcome. A benefit appeared in a subgroup chosen after the results were known, which is weak evidence. Again, this is a combination, not gentian alone. Hiccups after anaesthesia (one case report)Not enough evidenceOne man's hiccups after surgery stopped within a minute after he sipped gentian schnapps three times in a day. This is a single case; alcohol or chance could explain it. Airway inflammation (cells in a dish only)Not enough evidenceA 2026 lab study found a water extract of gentian root lowered inflammation signals in human airway cells. No animal or human test has followed. Antioxidant and radiation-damage protection (cells in a dish only)Not enough evidenceA 2026 cell study found gentian extract reduced radiation damage in human white blood cells. Reviews list antioxidant effects in lab work. None of this has been shown in people. Liver protection and killing germs (animal and lab only)Not enough evidencePurified gentiopicroside reduced liver injury in mice, and a gentian root extract stopped H. pylori growing in a dish (as summarised by the EU). Gentian is not a treatment for liver disease or for H. pylori infection. Chinese gentian (long dan cao) is a different plant used for the liver.

Benefits, one by one

Each card is a research question, not a promise. Tap a goal to filter. Open a card to see the studies, doses and limits.

Loss of appetite: bitter tonic taken before meals

Not enough evidence

Yellow gentian root is a classic European bitter tonic taken before meals to bring back appetite. The use rests on long tradition and on how bitter tastes act on the body. No controlled trial has tested gentian root alone for appetite, so the evidence is insufficient.

3 studiesTraditional forms in the EU monograph: tea of cut root, dry extract, …

Studies, doses and limits

What the trials found

We found no randomised controlled trial of gentian root alone for appetite. The EU assessment says controlled clinical trials of gentian root have not been performed and that the case for its use rests on long use and experimental data. The one open study (205 people) covered many digestive complaints, including loss of appetite, but the EU summary does not give appetite results on their own.

Results

No controlled result for appetite. The EU monograph says to take liquid forms about half an hour before a meal and a solid extract about an hour before; this is traditional practice, not a tested schedule.

Why this rating

No controlled trial of gentian root for appetite was found. The EU position is traditional use only.

Form and dose studied

Traditional forms in the EU monograph: tea of cut root, dry extract, liquid extract and tincture. Ask a doctor or pharmacist about amounts.

Who was studied

Adults. The EU says it is not recommended under 18 or in pregnancy and breastfeeding.

Limits

Evidence is traditional use plus lab and animal work. The EU monograph says to see a doctor if symptoms last more than 2 weeks; lasting loss of appetite or weight loss needs a doctor to look for the cause.

Why researchers looked

Gentian root is one of the most bitter plant materials known. Bitter tonics have been taken for centuries to prompt hunger and digestion.

Traditional use

The EU herbal committee accepts gentian root only as a traditional herbal medicine for temporary loss of appetite, based on at least 30 years of use. The German Commission E (1985, revised 1990) listed loss of appetite, a feeling of fullness and flatulence. A 1938 handbook called it a bitter stomach tonic and stimulant.

Proposed mechanism Preliminary mechanism

The main idea is a taste reflex: bitter compounds (mostly gentiopicroside and amarogentin) stimulate taste nerves in the mouth, which prompts saliva and stomach juice. The EU report notes the exact mechanism is not finally known. Bitter taste receptors have also been found in the gut of animals.

A proposed mechanism does not show that the effect happens in people.

See the Safety tab for ulcers, headache and the poisonous look-alike plant.

^{29 27 28}

Mild indigestion, fullness and bloating (dyspepsia)

Very low certainty

Gentian root is traditionally used for mild indigestion, a full feeling and bloating. The best human data are one open study of 205 people with no comparison group, and a small trial of a mixed product. The evidence is very low.

4 studiesThe open study used capsules of dry extract (DER 4.4-5.5:1, ethanol 5…

Studies, doses and limits

What the trials found

Wegner 1997 (as summarised in the EU report; original not read): an open study of 205 people (average age 53, 65% women) with heartburn, nausea, stomach pain, loss of appetite, constipation and flatulence took capsules of gentian root dry extract for 15 days. The average improvement was 68%, and doctors rated the result excellent in 31%, good in 55%, moderate in 9% and inadequate in 5%. There was no placebo group. Borgia 1981 (also as summarised): a controlled trial of a mix of rhubarb, cascara, boldo and gentian tincture beat placebo, but gentian was one part of a mixed product.

Results

A large improvement was reported, but with no comparison group the natural course of mild indigestion, the expectation of benefit and the doctors' knowledge of the treatment cannot be separated from any real effect. The EU report says the study only supports plausibility.

Effect sizes as reported

Average symptom improvement 68% in an open study (n=205); no controlled effect size

Why this rating

One open, uncontrolled study and a combination-product trial. The EU assessment itself says the open design means the study only supports plausibility, and that controlled clinical trials of gentian root have not been performed.

Form and dose studied

The open study used capsules of dry extract (DER 4.4-5.5:1, ethanol 53%) for 15 days. Ask a doctor or pharmacist about amounts.

Who was studied

Adults with mild digestive complaints

Limits

Open design, no placebo, short, one extract. Symptoms were many and mixed. Funding not read.

Why researchers looked

Many European bitters and digestive teas contain gentian. The EU lists "mild dyspeptic/gastrointestinal disorders" as the second traditional use.

Traditional use

Used in Europe for stomach complaints, fullness and flatulence (Commission E 1985, 1990; handbooks from 1938 on). Gentian root is also found in many combination digestive products with other bitter herbs.

Proposed mechanism Preliminary mechanism

Bitter taste may raise saliva, stomach juice and bile flow, which is the usual explanation for easing a heavy stomach. The EU report also suggests that a solid extract may act in the stomach itself, but this rests on one uncontrolled study.

A proposed mechanism does not show that the effect happens in people.

Adverse events in 2.4% of the 205 people (flatulence, soft stools, stomach cramps, nausea; one headache). EMA says these cannot be tied to the extract because they are also symptoms of the condition.

^{29 27 41 24}

Stimulating saliva and stomach juice (the bitter reflex)

Very low certainty

In lab and animal work, gentian extract raised stomach secretion. In humans, a 2% gentian tincture raised saliva in healthy volunteers. This is a body response, not a health benefit by itself, and it is the reason people with stomach ulcers or too much stomach acid should take care.

5 studiesNot applicable

Studies, doses and limits

What the trials found

Borgia 1981 (as summarised by EMA): 24 healthy volunteers in a six-way crossover found gentian tincture 2% raised salivary secretion over 30 minutes compared with placebo, similar to an acid control. Older studies (Blumberger and Glatzel 1966; Ivancevic and Kadrnka 1938) are described in the EU report as showing more saliva, gastric fluid and mucus, with missing details of the extracts. No modern controlled trial measured stomach acid after gentian root alone.

Results

Saliva rose briefly in healthy volunteers. Stomach acid effects come from cells and animals and from old, poorly described human work.

Effect sizes as reported

Acid marker 1.7-fold at 100 micrograms/mL (rat cells, as summarised); rat stomach pH 4.25 to 4.85 at the 4% extract (as summarised)

Why this rating

Human data are old, small and only known through the EU summary; acid findings are from rat cells and rats.

Who was studied

Healthy volunteers (saliva); rats and rat cells (stomach)

Limits

Increased secretion is a body response, not a proven benefit. No trial shows that it improves symptoms.

Why researchers looked

Stimulating saliva and stomach juice is the proposed way gentian works as a bitter tonic.

Traditional use

Old books describe bitters as increasing stomach juice and bile ("gastric stimulant, sialagogue, cholagogue"). The EU report cites experiments from 1903 and 1915 in dogs.

Proposed mechanism Laboratory research

In rat stomach cells in a dish, an aqueous gentian root extract raised an acid-production marker 1.7-fold at 100 micrograms/mL. In rats, gentian extract placed in the stomach raised gastric secretion, with a small rise in pH only at the strongest dose.

A proposed mechanism does not show that the effect happens in people.

Because gentian may raise stomach juice, people with stomach or duodenal ulcers, heartburn or reflux should ask a doctor first. The first EU monograph (2009) listed peptic ulcer as a contraindication; the 2018 revision dropped it and lists only allergy. A cautious approach fits the mechanism.

^{27 24 33 35 28}

Blood-vessel response to bitter gentian water (healthy volunteers)

Very low certainty

In a small study of healthy people, gentian root stirred into water, but not in capsules, briefly tightened small blood vessels and lowered the heart's output per beat. This points to a taste reflex. It is body physiology, not a treatment.

2 studiesNot applicable

Studies, doses and limits

What the trials found

McMullen 2014 (abstract read): healthy adults took 1000 mg gentian root in capsules (n=14) or 500 or 1500 mg in 100 mL water (n=12). Capsules changed nothing. Gentian water increased resistance in the body's small blood vessels and lowered cardiac output, mainly through a smaller stroke volume.

Results

A short reflex response only with the taste in the mouth.

Effect sizes as reported

Direction reported; numbers not in the abstract

Why this rating

One small physiology study in healthy people, single dose, no symptom or health outcome.

Who was studied

Healthy adults

Limits

Very small, single dose, short readings, not a benefit.

Why researchers looked

The authors asked whether the bitter taste, rather than the stomach, triggers a body response that helps digestion.

Traditional use

Not a traditional use.

Proposed mechanism Preliminary mechanism

The authors call the response a sympathetically-mediated cephalic-phase response, meaning a reflex triggered by taste. Blood pressure rose no more than with plain water, probably because the body balanced the change.

A proposed mechanism does not show that the effect happens in people.

The EU report records one German case of high blood pressure after a solid gentian product, in a person with a history of high blood pressure; no cause was established.

^{9 27}

Acute sinus infection (rhinosinusitis): Sinupret five-plant combination

Low certainty

A branded five-plant mix called Sinupret, which includes gentian root, helped relieve acute sinusitis symptoms in several trials. Gentian is only one fifth of the mix by design, so the results cannot be put down to gentian. We rate it low and flag it as a combination.

7 studiesDragees, drops and a dry extract of the five-plant combination. Ask a…

Studies, doses and limits

What the trials found

Melzer 2006 (systematic review, about 900 people): after 2 weeks BNO-101 beat placebo as an add-on to antibiotics, with patient-rated "cured" 61.1% vs 34.5% (2 trials, 159 vs 160 patients). Jund 2015 (386 adults with acute viral sinusitis, 15 days): symptom score 2.07 vs 3.47 with placebo (p=0.0001), number needed to treat 7, side effects 9.8% vs 14.1%. Popovych 2020 (292 children aged 6 to 11, open-label, no placebo): about three days earlier relief and 1.81-fold less antibiotic prescribing. Passali 2015 (60 adults, open-label, compared with a steroid nose spray) and Sen'kevich 2021 (107 young children, open) reported improvement. Koch 2016 (systematic review of herbal treatments, 7 trials) said the Sinupret products "might be helpful" but that trials were few and uneven.

Results

Most trials of the combination favour it over placebo or no treatment, with modest gains. Open trials without placebo are weaker.

Effect sizes as reported

Cured 61.1% vs 34.5% (add-on to antibiotics, pooled 2 trials); symptom score 2.07 vs 3.47 (n=386); NNT 7

Why this rating

Several positive trials, but all test a five-plant combination, many are open-label or old, the manufacturer's product codes (BNO) suggest industry links, and the reviewers call for more research. Not specific to gentian.

Form and dose studied

Dragees, drops and a dry extract of the five-plant combination. Ask a doctor or pharmacist about amounts.

Who was studied

Adults and children (6 to 11) with acute rhinosinusitis

Limits

Sinupret is a fixed mix of five plants (gentian root, primula flower, sorrel herb, elderflower, verbena herb); gentian is one fifth of the mix by design (1:3:3:3:3 in BNO-101), so results cannot be credited to gentian alone. Funding was not stated in the abstracts read. Placebo-controlled trials are older or industry-linked.

Why researchers looked

Gentian root is one of five herbs in Sinupret, a German product used for colds and sinus complaints for decades. The EU report notes gentian is an ingredient of several combination products for nose and sinus symptoms.

Traditional use

The EU report says combinations with gentian are, if anything, more traditional than gentian alone. This is a combination use, not a single-herb use.

Proposed mechanism Laboratory research

In nose and sinus cells in a dish, Sinupret raised chloride secretion about 3-fold, increased the beating of the lining's tiny hairs (cilia) and deepened the liquid layer, which in theory helps clear mucus. This is for the mix, not gentian alone.

A proposed mechanism does not show that the effect happens in people.

Adverse events were similar to placebo in the trials read. Many sinus infections are viral and clear alone; see a doctor for severe or lasting symptoms.

^{10 6 16 14 19 7 23}

Long-lasting sinus inflammation (chronic rhinosinusitis): Sinupret extract

Very low certainty

A large 12-week trial of the five-plant extract (BNO 1016) missed its planned main result against placebo. A later look at a subgroup found a benefit, but that kind of result is weak. Rated very low, and it is a combination, not gentian alone.

2 studiesTwo doses of the extract were tested. Ask a doctor or pharmacist abou…

Studies, doses and limits

What the trials found

Palm 2017 (929 adults with chronic rhinosinusitis, 12 weeks, two doses vs placebo): not better than placebo on the planned main outcome. A post-hoc analysis in people with a high starting symptom score (over 9) and disease for more than a year found a benefit. Safety was reported as good.

Results

Null on the main outcome; positive only in a subgroup chosen after seeing the data.

Effect sizes as reported

Primary endpoint not met; no numbers in abstract

Why this rating

The main result was null. A post-hoc subgroup effect is hypothesis-generating only.

Form and dose studied

Two doses of the extract were tested. Ask a doctor or pharmacist about amounts.

Who was studied

Adults with chronic rhinosinusitis

Limits

Why researchers looked

The same combination used for acute sinusitis was tried for sinusitis lasting more than 12 weeks.

Traditional use

No separate tradition.

Proposed mechanism Laboratory research

Same lab idea as for acute sinusitis: more mucus clearance in sinus lining cells (mix, not gentian alone).

A proposed mechanism does not show that the effect happens in people.

Reported as safe and well tolerated in the trial; no details in the abstract.

^{13 7}

Hiccups after anaesthesia (one case report)

Not enough evidence

One 70-year-old man had hiccups after surgery that stopped within a minute after he sipped about 20 mL of traditional gentian schnapps, three times in a day. This is a single case, and the alcohol or chance could explain it.

1 studiesGentian schnapps (alcohol)

Studies, doses and limits

What the trials found

Wiedermann 2026 (case report, n=1): hiccups after propofol anaesthesia did not respond to metoclopramide, but stopped within a minute after about 20 mL of gentian schnapps, three times the same day, and did not return.

Results

One person; hiccups stopped. Hiccups often stop alone and the alcohol or strong taste may explain it, as the authors note.

Effect sizes as reported

n=1

Why this rating

A single case report cannot show cause and effect.

Form and dose studied

Gentian schnapps (alcohol)

Who was studied

One 70-year-old man

Limits

One case; no control; alcohol is a confounder.

Why researchers looked

The authors wondered whether strong bitter taste could interrupt the hiccup reflex.

Traditional use

Gentian schnapps is a traditional alpine spirit; use for hiccups is not documented as a tradition in the sources read.

Proposed mechanism Pharmacological theory

The authors suggest bitter taste receptors in the mouth and gut could influence the nerve reflex behind hiccups. This is a hypothesis.

A proposed mechanism does not show that the effect happens in people.

Gentian spirits are a known route for poisoning if made from the wrong plant (see the Safety tab).

²⁰

Airway inflammation (human lung-lining cells in a dish)

Not enough evidence

A 2026 cell study found that a water extract of gentian root lowered inflammation signals (IL-6, IL-8) in human airway cells exposed to a bacterial toxin, without harming the cells. This is a dish experiment only.

1 studiesNot applicable

Studies, doses and limits

What the trials found

No human trial of gentian root alone for any airway condition was found. Wildhaber 2026 used human Calu-3 airway cells (0.1 to 12.5 mg/mL extract).

Results

Less IL-6 and IL-8 after a bacterial-toxin challenge; no cell damage.

Effect sizes as reported

Reduced; no numbers in the abstract

Why this rating

Cell work only. It cannot show an effect in the human body.

Who was studied

Cell cultures

Limits

Dish study, no animals or people.

Why researchers looked

A little-known traditional use for breathing problems prompted the test.

Traditional use

The authors describe respiratory use as little known.

Proposed mechanism Laboratory research

The extract lowered the activity of the genes for IL-6, CXCL8 (IL-8) and IL33 in the stimulated cells. Bitter secoiridoids were present in the extract.

A proposed mechanism does not show that the effect happens in people.

None applicable.

²¹

Protecting cells from oxidative and radiation damage (cell study)

Not enough evidence

A 2026 lab study found gentian root extract reduced radiation damage in human white blood cells in a dish. A review also lists antioxidant effects in cell and animal work. None of this shows a benefit for people.

2 studiesNot applicable

Studies, doses and limits

What the trials found

No human trial. A 2023 systematic review (Ponticelli) reports promising activity against oxidative stress, microbes, inflammation, obesity and atherosclerosis across cell, animal and human reports, but its abstract does not list the human trials or numbers, so no human claim is made.

Results

Better cell survival and less damage in irradiated blood cells (Kostic 2026).

Effect sizes as reported

Improved; no numbers in the abstract

Why this rating

Cell studies only.

Who was studied

Human white blood cells in a dish

Limits

Dish study; not evidence of protection in people.

Why researchers looked

Gentian root is known to have antioxidant compounds.

Traditional use

Not a traditional use.

Proposed mechanism Laboratory research

Pretreated cells had less oxidative stress and DNA damage and better antioxidant responses. The extract contained gentiopicroside, loganic acid, sweroside, swertiamarin and rosmarinic acid.

A proposed mechanism does not show that the effect happens in people.

None applicable.

^{8 15}

Liver protection and killing germs (animal and lab only)

Not enough evidence

Purified gentiopicroside, one of gentian's bitter compounds, reduced liver injury in mice, and a gentian root extract stopped H. pylori growing in a dish. These are animal and lab findings only, and gentian is not used for either in people.

4 studiesNot applicable

Studies, doses and limits

What the trials found

No human trial. The data are known here only through the EU assessment report (original papers not read) and a review abstract.

Results

Less liver injury in mice at 30 to 60 mg/kg a day of purified compound; H. pylori growth stopped in cultures.

Effect sizes as reported

Not available

Why this rating

Animal and lab studies only, mostly of purified compound.

Who was studied

Mice; bacterial cultures

Limits

Whole root has not been tested for liver protection in people. Do not use gentian to treat a liver problem or an H. pylori infection.

Why researchers looked

Gentiopicroside is the main bitter compound; it is studied in many cell and animal tests.

Traditional use

Chinese medicine uses other gentian species (long dan cao, qin jiao) for the liver and gallbladder; that is a separate tradition and those are different species.

Proposed mechanism Animal research

Mice given gentiopicroside before a liver poison (carbon tetrachloride, or LPS/BCG) had less liver injury. A methanol gentian root extract blocked growth of 15 H. pylori strains in a dish at 100 micrograms/mL. A review of purified gentiopicroside lists many lab effects.

A proposed mechanism does not show that the effect happens in people.

There is no human liver-injury report found for gentian root (see Safety tab).

^{34 36 1 27}

Connections to the rest of health

How Gentian connects to the rest of our health knowledge graph. Every link says what kind of connection it is. A safety link (for example to the liver) is a warning, not a benefit. A study that merely mentions a topic never creates a benefit link.

Explore every connection: goals, body systems, organs, symptoms, genes

Kind of connection Connected to Search

A. Wellness goals

Connected to	Kind of connection	Evidence status	Context	Studies
Digestive Support	Traditional use	Not enough evidence	Loss of appetite: bitter tonic taken before meals: Yellow gentian root is a classic European bitter tonic taken before meals to bring back appetite. The use rests on long tradition and on how bitter tastes act on the body. No controlled trial has tested gentian root alone for appetite, so the evidence is insufficient. Mild indigestion, fullness and bloating (dyspepsia): Gentian root is traditionally used for mild indigestion, a full feeling and bloating. The best human data are one open study of 205 people with no comparison group, and a small trial of a mixed product. The evidence is very low.	^{29 27 28 41 24}
Gut Health	Traditional use	Very low certainty	Mild indigestion, fullness and bloating (dyspepsia): Gentian root is traditionally used for mild indigestion, a full feeling and bloating. The best human data are one open study of 205 people with no comparison group, and a small trial of a mixed product. The evidence is very low.	^{29 27 41 24}
Digestive Support	Preliminary mechanism	Very low certainty	Stimulating saliva and stomach juice (the bitter reflex): In lab and animal work, gentian extract raised stomach secretion. In humans, a 2% gentian tincture raised saliva in healthy volunteers. This is a body response, not a health benefit by itself, and it is the reason people with stomach ulcers or too much stomach acid should take care.	^{27 24 33 35 28}
Digestive Support	Biological association	Very low certainty	Blood-vessel response to bitter gentian water (healthy volunteers): In a small study of healthy people, gentian root stirred into water, but not in capsules, briefly tightened small blood vessels and lowered the heart's output per beat. This points to a taste reflex. It is body physiology, not a treatment.	^{9 27}
Immune Support	Potential benefit	Low certainty	Acute sinus infection (rhinosinusitis): Sinupret five-plant combination: A branded five-plant mix called Sinupret, which includes gentian root, helped relieve acute sinusitis symptoms in several trials. Gentian is only one fifth of the mix by design, so the results cannot be put down to gentian. We rate it low and flag it as a combination. Long-lasting sinus inflammation (chronic rhinosinusitis): Sinupret extract: A large 12-week trial of the five-plant extract (BNO 1016) missed its planned main result against placebo. A later look at a subgroup found a benefit, but that kind of result is weak. Rated very low, and it is a combination, not gentian alone.	^{10 6 16 14 19 7 23 13}
Inflammation Balance	Preliminary mechanism	Not enough evidence	Airway inflammation (human lung-lining cells in a dish): A 2026 cell study found that a water extract of gentian root lowered inflammation signals (IL-6, IL-8) in human airway cells exposed to a bacterial toxin, without harming the cells. This is a dish experiment only.	²¹
Healthy Aging	Preliminary mechanism	Not enough evidence	Protecting cells from oxidative and radiation damage (cell study): A 2026 lab study found gentian root extract reduced radiation damage in human white blood cells in a dish. A review also lists antioxidant effects in cell and animal work. None of this shows a benefit for people.	^{8 15}
Liver Support	Preliminary mechanism	Not enough evidence	Liver protection and killing germs (animal and lab only): Purified gentiopicroside, one of gentian's bitter compounds, reduced liver injury in mice, and a gentian root extract stopped H. pylori growing in a dish. These are animal and lab findings only, and gentian is not used for either in people.	^{34 36 1 27}

B. Body systems

Connected to	Kind of connection	Evidence status	Context	Studies
Digestive system	Contraindication	Low certainty	Ask a doctor first with stomach or duodenal ulcer, reflux or gastritis: gentian is used to raise stomach secretion; the 2009 EU monograph listed peptic ulcer as a contraindication, the 2018 one does not. Preparation or compound: Gentian root (bitter tonic)	^{28 29 27}
Reproductive system	Contraindication	Not enough evidence	Not recommended in pregnancy and breastfeeding: no data and no reproductive tests. Preparation or compound: Gentian root	^{29 27}
Digestive system	Traditional use	Very low certainty	Traditional use for loss of appetite and mild indigestion; one open study and small volunteer studies. Preparation or compound: Gentian root (bitter tonic)	^{29 41 27}
Respiratory system	Potential benefit	Low certainty	Acute sinus symptoms improved in several trials of the mix; not specific to gentian. Preparation or compound: Sinupret five-plant combination including gentian root	^{6 10}
Digestive System	Biological association	Not enough evidence	Studied for: Loss of appetite: bitter tonic taken before meals Studied for: Mild indigestion, fullness and bloating (dyspepsia)	^{29 27 28 41 24 33 35 9 20 34 36 1}
Cardiovascular System	Biological association	Very low certainty	Studied for: Blood-vessel response to bitter gentian water (healthy volunteers)	^{9 27}
Respiratory System	Biological association	Low certainty	Studied for: Acute sinus infection (rhinosinusitis): Sinupret five-plant combination Studied for: Long-lasting sinus inflammation (chronic rhinosinusitis): Sinupret extract	^{10 6 16 14 19 7 23 13 21}
Nervous System	Biological association	Not enough evidence	Studied for: Hiccups after anaesthesia (one case report)	²⁰
Immune System	Biological association	Not enough evidence	Studied for: Airway inflammation (human lung-lining cells in a dish) Studied for: Protecting cells from oxidative and radiation damage (cell study)	^{21 8 15}
Hepatic System	Biological association	Not enough evidence	Studied for: Liver protection and killing germs (animal and lab only)	^{34 36 1 27}

C. Body parts and organs

Connected to	Kind of connection	Evidence status	Context	Studies
Gut	Adverse effect or risk	Low certainty	Flatulence, soft stools, cramps and nausea in 2.4% of 205 people; cause not established. Preparation or compound: Gentian root dry extract	^{41 27}
Nervous system	Adverse effect or risk	Low certainty	Headache (one in 205 people; "may occur" in the 2009 EU monograph). Preparation or compound: Gentian root	^{41 28}
Heart	Adverse effect or risk	Low certainty	Slow heart rate and low blood pressure after gentian drinks made from the wrong plant; all recovered in the reports read. Preparation or compound: White hellebore (Veratrum album) mistaken for gentian	^{3 17 22 5 2 18}
Blood vessels	Biological association	Very low certainty	Brief rise in small-vessel resistance after bitter gentian water in 12 healthy volunteers. Preparation or compound: Gentian root in water	⁹
Liver	Preliminary mechanism	Not enough evidence	Less liver injury in mice; no human data. Preparation or compound: Purified gentiopicroside	^{34 1}

E. Health conditions

Connected to	Kind of connection	Evidence status	Context	Studies
White hellebore (Veratrum) poisoning	Adverse effect or risk	Low certainty	Look-alike poisoning from mistaken gentian products. Case reports of poisoning with slow heart rate and low blood pressure after home-made gentian drinks. Preparation or compound: Veratrum album alkaloids (protoveratrines)	^{3 17 22 5 2 18}
Peptic ulcer	Contraindication	Low certainty	Caution because of stimulated stomach secretion; 2009 EU contraindication since dropped. Ask a doctor first; the 2009 EU monograph listed it as a contraindication, the 2018 one does not. Preparation or compound: Gentian root	^{28 29}
Pregnancy	Contraindication	Not enough evidence	Not recommended (EU). Preparation or compound: Gentian root	²⁹

I. Biomarkers

Connected to	Kind of connection	Evidence status	Context	Studies
Saliva production	Biological association	Very low certainty	Measured in trials: raised. A lab change is not the same as a health benefit.	^{24 27}
Stomach acid production	Biological association	Very low certainty	Measured in trials: raised. A lab change is not the same as a health benefit.	^{33 35 27}
Resistance of small blood vessels after a bitter drink	Biological association	Very low certainty	Measured in trials: raised. A lab change is not the same as a health benefit.	⁹
Digestive symptom improvement (doctor rating)	Biological association	Very low certainty	Measured in trials: lowered. A lab change is not the same as a health benefit.	^{41 27}
Sinus symptom score (Major Symptom Score)	Biological association	Low certainty	Measured in trials: lowered. A lab change is not the same as a health benefit.	^{6 13}
Antibiotic prescribing	Biological association	Low certainty	Measured in trials: lowered. A lab change is not the same as a health benefit.	¹⁶
Inflammation signals IL-6 and IL-8 in airway cells	Biological association	Not enough evidence	Measured in trials: lowered. A lab change is not the same as a health benefit.	²¹
Mucus-clearing indicators in sinus cells	Biological association	Not enough evidence	Measured in trials: raised. A lab change is not the same as a health benefit.	²³

J. Genes, receptors and enzymes

Connected to	Kind of connection	Evidence status	Context	Studies
IL6, CXCL8 (IL-8), IL33	Preliminary mechanism	In vitro	Gene activity fell in LPS-stimulated human bronchial cells exposed to a water root extract.	²¹
TAS2R4 and TAS2R14 (bitter taste receptor genes)	Preliminary mechanism	In vitro	These transcripts were measured in the same airway cell study; the abstract does not report the result.	²¹
CFTR and TMEM16A (ANO1)	Preliminary mechanism	In vitro	Chloride channels activated by the five-plant Sinupret mix in human sinus cells.	²³
Base excision repair genes	Preliminary mechanism	In vitro	Expression was assessed in irradiated white blood cells pretreated with root extract; results are not described in detail in the abstract.	⁸

K. Biological pathways

Connected to	Kind of connection	Evidence status	Context	Studies
Taste-reflex stimulation of saliva, stomach juice and bile	Preliminary mechanism	Human	The proposed way bitter tonics act, per EMA; the exact mechanism is not finally known.	^{27 9}

L. Active compounds

Connected to	Kind of connection	Evidence status	Context	Studies
Gentiopicroside (gentiopicrin)	Biological association	Animal	The main bitter compound. Studied in cells and animals for liver, digestive, inflammatory and microbial effects (review). Human data for the purified compound were not found. Preparation or compound: Root bark	^{4 12 1 38 27}
Amarogentin	Biological association	In vitro	Responsible for much of the bitterness in very small amounts. Preparation or compound: Root	^{12 27 38}
Swertiamarin	Biological association	Other	Minor bitter compound; reported only occasionally in the EU report. Preparation or compound: Root	^{12 38}
Sweroside	Biological association	Other	Minor compound; dominates in some liqueurs. Preparation or compound: Root	^{12 4 38}
Loganic acid	Biological association	Other	Marker compound; no specific effect shown. Preparation or compound: Root	^{12 8 38}
Gentisin	Biological association	In vitro	Mutagenic in the Ames bacterial test (6.94 revertants per microgram). Preparation or compound: Root (gives the yellow colour)	^{11 27 38}
Isogentisin	Biological association	In vitro	Mutagenic in the Ames test (19.1 revertants per microgram). Preparation or compound: Root	^{11 12 38}
Gentiobiose and gentianose (sugars)	Biological association	Other	Gentianose breaks down to sweeter sucrose or bitter gentiobiose during drying. Preparation or compound: Root	^{27 38}
Rosmarinic acid	Biological association	In vitro	Detected with gentiopicroside, loganic acid, sweroside and swertiamarin in a root extract used in a radiation cell study. Preparation or compound: Root (aqueous extract)	⁸
Isovitexin (flavonoid)	Biological association	Animal	In diabetic rats, root extract and isovitexin had anti-atherosclerotic activity (Kesavan 2016, as summarised by EMA; not read). Preparation or compound: Root (per EU report)	^{27 38}
Volatile oil and others	Biological association	Other	Give the liqueur flavour. Preparation or compound: Root	²⁷

Each connection is stored with the ingredient, the connected record, the kind of connection, the evidence status, the supporting studies, the preparation or compound involved, and a review date (last reviewed October 25, 2026).

Evidence at a glance: what changed in 8 lab markers

Tap a number to show only those markers. Counts are markers, not people.

Other44

The evidence

The research centre for Gentian. Every record here was checked against PubMed or the publisher's page; we never list a study we have not verified.

Evidence by outcome

Loss of appetite: bitter tonic taken before meals 3 studies Not enough evidence Mild indigestion, fullness and bloating (dyspepsia) 4 studies Very low certainty Stimulating saliva and stomach juice (the bitter reflex) 5 studies Very low certainty Blood-vessel response to bitter gentian water (healthy volunteers) 2 studies · 14 people in trials Very low certainty Acute sinus infection (rhinosinusitis): Sinupret five-plant combination 7 studies · 845 people in trials Low certainty Long-lasting sinus inflammation (chronic rhinosinusitis): Sinupret extract 2 studies · 929 people in trials Very low certainty Hiccups after anaesthesia (one case report) 1 study Not enough evidence Airway inflammation (human lung-lining cells in a dish) 1 study Not enough evidence Protecting cells from oxidative and radiation damage (cell study) 2 studies Not enough evidence Liver protection and killing germs (animal and lab only) 4 studies Not enough evidence

Bars show how many studies we found for each outcome, not how well it works. People are added up across trials only (reviews are not added, to avoid double counting).

How we rate evidence

High certainty

Several well-run trials or reviews agree; further research is unlikely to change the picture much.

Moderate certainty

Good trials point the same way, but some doubt remains.

Low certainty

Small, short or inconsistent trials. The finding could change with better research.

Very low certainty

Very little or very weak human data. Treat as a possibility only.

Mixed findings

Trials or reviews disagree with each other.

Not enough evidence

Not enough human research to say either way.

Evidence against

Good research found no benefit, or found harm.

We take the reviewers' own risk-of-bias and GRADE statements where they exist, and otherwise judge from study size, design, consistency, directness and whether a product matches what is sold. Many publications do not make evidence high. Method note: We searched PubMed, read the full EU herbal monograph (2018), the full EU draft assessment report (2018) and the clinical sections of the superseded 2009 monograph, and checked plant names in GBIF and NCBI Taxonomy and compounds in PubChem. Nearly all studies were read as PubMed abstracts only; several older human and animal studies are known only through the EU report. Not verified: the Commission E monograph, FDA, NCCIH, LiverTox, LactMed and WHO statements, the IUCN global assessment (search summaries only) and the EU Habitats Directive text. Certainty ratings are the compilers' own reading, not formal GRADE.

Study library: every study we checked 41

Design Research type Plant part Year from Search

Study	Design	People	Product, dose, length	Result
Antoniadi 2023 Gentiopicroside-An Insight into Its Pharmacological Significance and Future Perspectives. Cells · PMID 38201274 · DOI	Systematic review in-vitro	Cell and animal studies of purified gentiopicroside (not whole root)	Purified gentiopicroside compound Various Various · vs Various	Review of in-vitro and in-vivo reports that point to roles in digestive, inflammatory, microbial, bone and nerve conditions. No human trial data are described in the abstract. None (None) Methods, limits and funding Outcomes: Biological properties of gentiopicroside Limitations: Only the abstract was read. Narrative review of a single purified compound; it cannot be moved to the whole root or to tea. Funding and conflicts: No conflicts declared Read: abstract
Festa 1996 [A case of Veratrum poisoning]. Minerva Anestesiol · PMID 9045097	Case report	1 One person who drank an infusion made from Veratrum album mistaken for Gentiana lutea	Veratrum album infusion whole plant (mistaken for gentian)	Heartburn, vomiting, slow or irregular heartbeat (bradyarrhythmia), loss of link between atria and ventricles and widened blood vessels. The authors say atropine is the drug of choice and describe how to tell the plants apart: Veratrum leaves alternate along the stem and its flowers are white, gentian leaves are opposite and its flowers yellow. One case (Not applicable) Methods, limits and funding Outcomes: Symptoms Limitations: Only the abstract was read (Italian-language paper). One case. Funding and conflicts: Not stated Read: abstract
Garnier 1985 [Acute dietary poisoning by white hellebore (Veratrum album L.). Clinical and analytical data. A propos of 5 cases]. Ann Med Interne (Paris) · PMID 4073696	Case series	5 Five people who drank home-made gentian wine	Home-made gentian wine found to contain Veratrum alkaloids root (home-made wine) Symptoms began minutes after drinking	Nausea, vomiting, belly pain, low blood pressure and slow heart rate. In one patient there was complete heart block. All recovered within hours with supportive care and/or atropine. All the wines contained Veratrum alkaloids. The authors note the two plants often grow side by side and are easy to confuse before flowering. 5 of 5 poisoned; all recovered (Not applicable) Methods, limits and funding Outcomes: Symptoms, heart rhythm, chemical analysis of the wines Limitations: Only the abstract was read (French-language paper). Small series. It proves the mix-up is real in home-made products. Funding and conflicts: Not stated Read: abstract
Gibitz-Eisath 2022 Simultaneous Quantitative Analysis of the Major Bioactive Compounds in Gentianae Radix and its Beverages by UHPSFC-DAD. J Agric Food Chem · PMID 35695390 · DOI	Other other	13 gentian root batches and 10 commercial liquid products (7 liqueurs, 3 clear spirits)	Gentiana lutea root and commercial gentian drinks root	Gentiopicroside dominated every root batch (2.1 to 5.6%). In liqueurs the amounts and mix of compounds varied a great deal; no measurable marker compounds were found in any of the three clear spirits. Gentiopicroside 2.1-5.6% in roots (Not applicable) Methods, limits and funding Outcomes: Content of nine marker compounds Limitations: Only the abstract was read. A chemistry paper; it shows products vary, not what they do in the body. Funding and conflicts: No competing financial interest declared Read: abstract
Grobosch 2008 Accidental intoxication with Veratrum album. J Anal Toxicol · PMID 19021933 · DOI	Case report	1 A 49-year-old man who drank two glasses (about 2 x 20 mL) of a drink sold as containing yellow gentian	Drink with 25% alcohol and Veratrum alkaloids protoveratrine A (20.4 mg/L) and B (13.7 mg/L) root (drink) About 40 mL Symptoms shortly after drinking	Nausea, vomiting, tingling of the mouth, a heart rate of 35 per minute and blood pressure of 50/30 mmHg. Treated with charcoal, anti-sickness drugs, atropine and fluids, he recovered fully within 24 hours. Protoveratrines A and B were found in the drink and in his blood. Heart rate 35/min; BP 50/30 mmHg; recovered in 24 h (Not applicable) Methods, limits and funding Outcomes: Symptoms, blood levels Limitations: Only the abstract was read. One case, but with chemical proof of the toxin in the drink. Funding and conflicts: Not stated Read: abstract
Jund 2015 [Clinical efficacy of a herbal drug combination in acute viral rhinosinusitis]. MMW Fortschr Med · PMID 26013113 · DOI	Controlled trial	386 Adults with symptomatic acute viral rhinosinusitis	Sinupret extract dry-extract dragees (five-plant combination incl. gentian root) root+flower+herb (combination) 3 x 160 mg a day 15 days · vs Placebo	Major Symptom Score 2.07 (SEM 0.18) with the extract vs 3.47 (SEM 0.28) with placebo (p=0.0001; per-protocol, n=300). Number needed to treat 7. Adverse events 9.8% with the extract vs 14.1% with placebo; no serious events. Score difference 1.40 points; NNT 7 (Not given in abstract) Methods, limits and funding Outcomes: Major Symptom Score at end of treatment (investigator-assessed) Limitations: Only the abstract was read. Combination product. Per-protocol analysis (300 of 386). Funding not stated in abstract; the product code BNO belongs to the manufacturer, so independence is not assumed. Funding and conflicts: Funding not stated in abstract; treat as industry-linked Read: abstract
Koch 2016 [A Systematic Review of Phytotherapy for Acute Rhinosinusitis]. Forsch Komplementmed · PMID 27404100 · DOI	Systematic review	Adults and children with acute rhinosinusitis; 7 trials in all, covering several herbal products	Herbal products incl. BNO 1016 (Sinupret extract) and BNO 101 (Sinupret) various (combination products) Various Various · vs Placebo or other comparators	Seven trials covered six herbal products. The authors say EPs 7630 (Pelargonium) appeared useful, Myrtol showed benefit against a placebo compound, and BNO 1016 and BNO 101 "might be helpful". Evidence for Cyclamen europaeum and Esberitox was little. Risk of bias varied. No pooled numbers in abstract (Not in abstract) Methods, limits and funding Outcomes: Symptoms of acute rhinosinusitis Limitations: Only the abstract was read (German-language paper). Few trials, uneven quality, authors call for more research. Combination products. Funding and conflicts: Not stated in abstract Read: abstract
Kostić 2026 Gentiana lutea Root Extract Attenuates Radiation-Induced Damage in Human PBMCs in vitro. Dose Response · PMID 41884402 · DOI	Laboratory research in-vitro	Human white blood cells (PBMCs) from blood, exposed to gamma radiation	Gentiana lutea root extract (GRE), 0.25 to 2 mg/mL, with gentiopicroside, loganic acid, sweroside, swertiamarin and rosmarinic acid detected root 0.25 to 2 mg/mL given 24 h before radiation 24 h pretreatment · vs Cells without extract	Pretreated cells survived better, had less oxidative and DNA damage and stronger antioxidant responses after radiation. Improved; no numbers in abstract (Not given in abstract) Methods, limits and funding Outcomes: Cell survival, oxidative and DNA damage Limitations: Only the abstract was read. Cell study only. Not evidence that gentian protects people from radiation. Funding and conflicts: No competing interests declared Read: abstract
McMullen 2014 Bitter tastants alter gastric-phase postprandial haemodynamics. J Ethnopharmacol · PMID 24802704 · DOI	Controlled trial	14 Healthy adults; 14 took capsules, 12 drank gentian water, 12 drank wormwood water	Gentian root (Gentiana lutea) powder: 1000 mg in capsules, or 500 or 1500 mg in 100 mL of water root 1000 mg capsule; 500 or 1500 mg in water Single sitting, readings for minutes after · vs Cellulose capsule or plain water	Capsules did not change readings. Gentian in water (500 and 1500 mg) raised resistance in the body's small blood vessels and lowered cardiac output, mainly by a smaller stroke volume, not heart rate. Blood-pressure rise was no bigger than with water alone. Direction only reported in abstract (Not given in abstract) Methods, limits and funding Outcomes: Heart and blood-vessel readings after drinking Limitations: Only the abstract was read. Very small groups; single dose; healthy people; the readings are physiology, not a health benefit. Applies to the taste in the mouth, since capsules had no effect. Funding and conflicts: Funding not stated in abstract Read: abstract
Melzer 2006 Systematic review of clinical data with BNO-101 (Sinupret) in the treatment of sinusitis. Forsch Komplementmed · PMID 16645287 · DOI	Meta-analysis	900 Mostly young adult men with sinusitis; 6 controlled trials reassessed, 4 pooled	BNO-101 (Sinupret): gentian root, primula flower, sorrel herb, elderflower, verbena herb in ratio 1:3:3:3:3 (a combination) root+flower+herb (combination) 2 weeks · vs Placebo (2 trials, as add-on to antibiotics); ambroxol (2 trials); N-acetylcysteine and Myrtol (2 open trials)	After 2 weeks BNO-101 beat placebo (2 trials, 159 vs 160 patients, both add-on to antibiotics): patient-rated "cured" 61.1% vs 34.5%, with fewer blocked drains, less headache and better X-ray signs (all p<0.05). Against ambroxol (2 trials, 151 vs 150) there was no overall difference. Open trials against N-acetylcysteine and Myrtol showed no significant difference. Adverse events were similar to placebo. Cured 61.1% vs 34.5% (placebo comparison) (Not given in abstract) Methods, limits and funding Outcomes: Patient-rated cure, drain obstruction, headache, X-ray signs Limitations: Only the abstract was read. Combination product, so the benefit cannot be put down to gentian. Mostly young men. Funding not stated in the abstract; BNO is the manufacturer's product code, so independence is not assumed. Old trials (the review is from 2006). Funding and conflicts: Funding not stated in abstract; Research Support, Non-U.S. Gov't listed in PubMed Read: abstract
Morimoto 1983 Mutagenic activities of gentisin and isogentisin from Gentianae radix (Gentianaceae). Mutat Res · PMID 6338357 · DOI	Laboratory research in-vitro	Salmonella typhimurium TA100 bacteria (Ames test) with liver-enzyme mix	Gentisin and isogentisin, two xanthones purified from a methanol extract of gentian root root Over 10 to 50 micrograms: 19.1 (isogentisin) and 6.94 (gentisin) revertants per microgram · vs Untreated bacteria	The root extract was mutagenic in the test, and gentisin and isogentisin accounted for about 76% of the mutagenic activity in it. 19.1 and 6.94 revertants per microgram (isogentisin, gentisin) (Not applicable) Methods, limits and funding Outcomes: Mutation counts Limitations: Only the abstract was read. A bacterial test on purified compounds and a methanol extract, not on tea or tincture and not in animals or people. It signals a possible concern that has never been followed up in people. Funding and conflicts: Not stated Read: abstract
Mustafa 2015 Comparative HPLC/ESI-MS and HPLC/DAD study of different populations of cultivated, wild and commercial Gentiana lutea L. Food Chem · PMID 25529701 · DOI	Other other	20 samples of cultivated, wild and commercial G. lutea root from one Italian national park and the market	Gentiana lutea root root	Gentiopicroside was the largest compound (1.85 to 3.97%), then loganic acid (0.11 to 1.30%), isogentisin (0.03 to 0.48%), sweroside (0.05 to 0.35%), swertiamarin (0.08 to 0.30%) and amarogentin (0.01 to 0.07%). Ranges as listed (Not applicable) Methods, limits and funding Outcomes: Content of iridoids, secoiridoids and xanthones Limitations: Only the abstract was read. Chemistry only. Funding and conflicts: Not stated Read: abstract
Palm 2017 Assessment of efficacy and safety of the herbal medicinal product BNO 1016 in chronic rhinosinusitis. Rhinology · PMID 28214913 · DOI	Controlled trial	929 Adults with chronic rhinosinusitis	BNO 1016 (Sinupret extract, five-plant combination incl. gentian root), two dose levels root+flower+herb (combination) Two doses (not stated in abstract) 12 weeks · vs Placebo	The extract was not better than placebo on the planned main outcome. The authors saw a "trend" on secondary outcomes. A later (post-hoc) look at people with a high starting score (over 9) and disease for more than a year diagnosed by an ear-nose-throat specialist found a benefit. Safety was described as good. Primary endpoint not met; subgroup result is post-hoc (Not given in abstract) Methods, limits and funding Outcomes: Mean Major Symptom Score at weeks 8 and 12 Limitations: Only the abstract was read. The main result was null; the positive result comes from a subgroup chosen after seeing the data, which is weak evidence. Combination product. Author affiliations were not read. Funding and conflicts: Funding not stated in abstract; treat as industry-linked Read: abstract
Passali 2015 A prospective open-label study to assess the efficacy and safety of a herbal medicinal product (Sinupret) in patients with acute rhinosinusitis. ORL J Otorhinolaryngol Relat Spec · PMID 25661190 · DOI	Controlled trial	60 Adults with acute rhinosinusitis	Sinupret Forte (five-plant combination incl. gentian root) root+flower+herb (combination) 14 days · vs Intranasal fluticasone furoate (30 vs 30 patients)	All patients improved. None of the 30 Sinupret patients had an adverse event; 3 on fluticasone had minor ones. Vital signs and lab values were normal. All groups improved; no between-group test in abstract (Not given in abstract) Methods, limits and funding Outcomes: Major symptom scores, quality of life, adverse events Limitations: Only the abstract was read. Open-label, small, no placebo, so improvement could be natural recovery. Combination product. Funding and conflicts: Funding not stated in abstract Read: abstract
Ponticelli 2023 The healing bitterness of Gentiana lutea L., phytochemistry and biological activities: A systematic review. Phytochemistry · PMID 36423749 · DOI	Systematic review	Cell lines, animal models and human interventional trials of Gentiana lutea, as gathered by the review	Gentiana lutea extracts and bitter compounds (various) root Various Various · vs Various	The abstract says cell, animal and human trial reports show promising activity against oxidative stress, microbial infections, inflammation, obesity and atherosclerosis. It does not list the human trials or give any numbers. No effect sizes in the abstract (None given) Methods, limits and funding Outcomes: Chemistry and biological activity of yellow gentian Limitations: Only the abstract was read. It does not say which human trials were included, how many, or how good they were, so no human claim is taken from it beyond "reported as promising by the authors". Not a graded clinical review. Funding and conflicts: No competing interests declared Read: abstract
Popovych 2020 An open-label, multicentre, randomized comparative study of efficacy, safety and tolerability of the 5 plant - extract BNO 1012 in the Delayed Antibiotic Prescription Method in children, aged 6 to 11 years with acute viral and post-viral rhinosinusitis. Am J Otolaryngol · PMID 32593046 · DOI	Controlled trial	292 Children aged 6 to 11 with acute viral or post-viral rhinosinusitis	BNO 1012 (five-plant extract that includes gentian root) plus standard symptom care root+flower+herb (combination) · vs Standard symptom care only (no placebo)	Doctor-rated runny nose, congestion and post-nasal drip fell more with the extract (p<0.005 at visit 2). The treated group had a "therapeutic benefit" of three days in the first week, and antibiotic prescribing was 1.81-fold lower. Three days earlier relief; antibiotic prescribing 1.81-fold lower (Not given in abstract) Methods, limits and funding Outcomes: Doctor-rated congestion and runny nose, self-scored runny nose and headache, antibiotic prescribing Limitations: Only the abstract was read. Open-label with no placebo, so patients and doctors knew who took the extract. Combination product. Funding not stated in abstract. Funding and conflicts: Funding not stated in abstract; treat as industry-linked Read: abstract
Quatrehomme 1993 Intoxication from Veratrum album. Hum Exp Toxicol · PMID 8096707 · DOI	Case series	2 Two adults with Veratrum poisoning	Veratrum album (white hellebore) taken in error whole plant (mistaken for gentian) Symptoms within 30 minutes	Vomiting, low blood pressure and slow heart rate within 30 minutes; both cured without lasting effects. The authors, reviewing the literature, say such cases are nearly always accidental, from the difficulty in telling Veratrum album and Gentiana apart. 2 of 2 recovered (Not applicable) Methods, limits and funding Outcomes: Symptoms and outcome Limitations: Only the abstract was read. Small series. Funding and conflicts: Not stated Read: abstract
Rauber-Lüthy 2010 Low-dose exposure to Veratrum album in children causes mild effects--a case series. Clin Toxicol (Phila) · PMID 20170391 · DOI	Case series	11 11 children aged 8 to 12 at a youth camp who picked herbs for tea	Veratrum album accidentally collected as herb tea ingredient whole plant (mistaken for herb) Low dose, not quantified Recovered within 10 hours	Two children had no symptoms. Nine (82%) had mild stomach symptoms, six (55%) nerve symptoms and three (27%) a slow heart rate. All recovered completely within 10 hours. The authors state that V. album can be mistaken for yellow gentian, and that children had the same course as adults. 11 of 11 recovered (Not applicable) Methods, limits and funding Outcomes: Symptoms and recovery Limitations: Only the abstract was read. It is about a Veratrum exposure, not gentian; included to show how the look-alike is dangerous. Low dose. Funding and conflicts: Not stated Read: abstract
Sen'kevich 2021 [Comparative efficacy of various treatment regimens for children 2-5 years old with symptoms of acute viral rhinosinusitis]. Vestn Otorinolaringol · PMID 33720651 · DOI	Controlled trial	107 Children (the abstract text says aged 4 to 5) with acute viral rhinosinusitis	Sinupret oral drops (five-plant combination incl. gentian root) root+flower+herb (combination) 10 days (follow-up to day 14) · vs Standard treatment; standard treatment plus nose antibiotic drops	The authors report faster symptom improvement with Sinupret than without it. No numbers in the abstract (Not given) Methods, limits and funding Outcomes: Complaints and nasal lining over 10 days Limitations: Only the abstract was read (Russian-language paper). Open design. Combination product. The title says 2 to 5 years but the abstract says 4 to 5; no age claim is made beyond "young children". Sinupret drops are alcohol-containing in some markets (not verified). Funding and conflicts: Not stated in abstract Read: abstract
Wiedermann 2026 Gentian root bitters for the rapid suppression of post-propofol singultus: a case report. Wien Klin Wochenschr · PMID 40900241 · DOI	Case report	1 One 70-year-old man with hiccups after minor urology surgery under propofol	About 20 mL of traditional gentian schnapps (a spirit, strength not stated in abstract) root (spirit) About 20 mL Taken on 3 occasions the same day	Hiccups stopped within 1 minute after each of three doses and did not return. Metoclopramide had not worked. One person; no numbers to compare (Not applicable) Methods, limits and funding Outcomes: Hiccups stopping Limitations: One case. Hiccups often stop on their own, and the alcohol or the surprise of a strong taste could explain it. The authors say so themselves. A hypothesis, not a treatment. Funding and conflicts: No competing interests declared Read: abstract
Wildhaber 2026 Safety and anti-inflammatory activity of Gentiana lutea L. in human bronchial epithelial cell cultures. J Ethnopharmacol · PMID 41580168 · DOI	Laboratory research in-vitro	Human Calu-3 bronchial epithelial cells, alone and with immune cells	Aqueous (water) extract of Gentiana lutea root, 0.1 to 12.5 mg/mL root 0.1 to 12.5 mg/mL on cells · vs Untreated cells; methylprednisolone and quinine as references	No cell damage and the cell barrier stayed intact. The extract reduced IL-6 and IL-8 released after a bacterial toxin (LPS) and lowered IL6, CXCL8 and IL33 gene activity. Reduced, no numbers in abstract (Not given in abstract) Methods, limits and funding Outcomes: Cell damage, barrier integrity, IL-6 and IL-8 Limitations: Only the abstract was read. Cells in a dish; no animals or people. The authors call it first experimental support for a little-known respiratory use. Funding and conflicts: No competing interests declared Read: abstract
Zagler 2005 Dietary poisoning with Veratrum album--a report of two cases. Wien Klin Wochenschr · PMID 15773425 · DOI	Case series	2 Two adult men who drank gentian spirit	Gentian spirit later shown to be made from Veratrum album root (spirit) Seen in emergency department 6 hours after drinking	Headache, then nausea and vomiting within one hour; heart rates of 42 and 45 beats per minute (sinus bradycardia). Treated with activated charcoal and anti-sickness medicine, observed, and recovered; heart rate normal within 8 hours. Checking the drink confirmed that V. album had been mistaken for G. lutea. 2 of 2 recovered; heart rate 42 and 45 (Not applicable) Methods, limits and funding Outcomes: Symptoms, heart rate, outcome Limitations: Only the abstract was read. Two cases. Funding and conflicts: Not stated Read: abstract
Zhang 2014 Sinupret activates CFTR and TMEM16A-dependent transepithelial chloride transport and improves indicators of mucociliary clearance. PLoS One · PMID 25117505 · DOI	Laboratory research in-vitro	Mouse and human nose-and-sinus lining cells in culture	Sinupret (five-plant combination incl. gentian root) root+flower+herb (combination) · vs Untreated cells	Sinupret raised chloride secretion about 3-fold in human sinus cells (20.7 vs 6.4 microamps per cm2), increased cilia beat frequency and surface liquid depth, which should help clear mucus. 20.7 vs 6.4 uA/cm2 in human sinonasal cells (p<0.05) (Not given) Methods, limits and funding Outcomes: Chloride movement, hair-like cilia beating, surface liquid depth Limitations: Only the abstract was read. Cells in a dish; combination product, so no part can be credited to gentian. Two authors hold a pending patent on chloride-secretion therapy for sinus disease. Funding and conflicts: Patent interest declared by two authors Read: abstract
s-borgia-1981 Borgia M et al. Controlled trials of a herbal preparation containing gentian tincture (1981), as summarised in the EMA assessment report · Source	Controlled trial			Methods, limits and funding Read: summary-only
s-conservation-secondary Search-result summaries of IUCN global status and Habitats Directive listing for Gentiana lutea (secondary sources, not opened in full) · Source	Secondary n/a			Methods, limits and funding Read: summary-only
s-el-sedawy-1989 El-Sedawy et al. Transformation of gentiopicroside by human intestinal bacteria (1989), as summarised in the EMA assessment report · Source	Laboratory research in-vitro			Methods, limits and funding Read: summary-only
s-ema-ar-gentian-2018 EMA HMPC. Assessment report on Gentiana lutea L., radix (EMA/607863/2017), draft of 27 March 2018 · Source	Authoritative guidance n/a			Methods, limits and funding Read: full-text
s-ema-hmpc-gentian-2009 EMA HMPC. Community herbal monograph on Gentiana lutea L., radix, first version (adopted 12 November 2009); superseded · Source	Authoritative guidance n/a			Methods, limits and funding Read: full-text
s-ema-hmpc-gentian-2018 EMA HMPC. European Union herbal monograph on Gentiana lutea L., radix (EMA/HMPC/607861/2017), adopted 20 November 2018 · Source	Authoritative guidance n/a			Methods, limits and funding Read: full-text
s-gbif-gentiana-chinese GBIF Backbone: Gentiana scabra Bunge (7270205), G. manshurica Kitag. (3841132), G. macrophylla Pall. (7761022) · Source	Reference database n/a			Methods, limits and funding Read: full-text
s-gbif-gentiana-lutea GBIF Backbone: Gentiana lutea L. (usageKey 3170040) · Source	Reference database n/a			Methods, limits and funding Read: full-text
s-gbif-veratrum-album GBIF Backbone: Veratrum album L. (usageKey 2742119) · Source	Reference database n/a			Methods, limits and funding Read: full-text
s-gebhardt-1997 Gebhardt R. Aqueous gentian extract and acid production in isolated rat stomach cells (1997), as summarised in the EMA assessment report · Source	Laboratory research in-vitro			Methods, limits and funding Read: summary-only
s-kondo-1994 Kondo Y et al. Gentiopicroside and liver injury in mice (1994), as summarised in the EMA assessment report · Source	Animal research animal			Methods, limits and funding Read: summary-only
s-leslie-1978 Leslie GB. Gentian extract and gastric secretion in rats (1978), as summarised in the EMA assessment report · Source	Animal research animal			Methods, limits and funding Read: summary-only
s-mahady-2005 Mahady GB et al. Extracts of traditional digestive remedies against Helicobacter pylori (2005), as summarised in the EMA assessment report · Source	Laboratory research in-vitro			Methods, limits and funding Read: summary-only
s-ncbi-taxonomy-gentiana-lutea NCBI Taxonomy: Gentiana lutea (taxid 38851), yellow gentian · Source	Reference database n/a			Methods, limits and funding Read: full-text
s-pubchem-gentian-compounds PubChem compound records for gentian root constituents (queried by name 2026-10-25) · Source	Reference database n/a			Methods, limits and funding Read: full-text
s-redlist-north-macedonia-gentiana-lutea National Red List of North Macedonia: Gentiana lutea (ssp. symphyandra), assessed November 2019 · Source	Reference database n/a			Methods, limits and funding Read: full-text
s-wang-2007 Wang et al. Pharmacokinetics of gentiopicroside from Gentiana decoction, pure compound and Longdan Xiegan Tang in rats (2007), as summarised in the EMA assessment report · Source	Animal research animal			Methods, limits and funding Read: summary-only
s-wegner-1997 Wegner C. Open observational study of gentian root dry extract in 205 people with dyspeptic complaints (1997), as summarised in the EMA assessment report · Source	Observational			Methods, limits and funding Read: summary-only

What we do not know yet

What the evidence supports: the sinus mix for acute sinusitis is low; mild indigestion, the bitter reflex on saliva, stomach juice and blood vessels, and chronic sinusitis are very low; appetite, hiccups, airway inflammation, antioxidant effects and the liver and H. pylori findings are insufficient.
What is uncertain: the main digestive study was open with no placebo group and is known only through the EU report; sinus trials tested a five-plant mix, were often open-label and are likely industry-linked.
What has never been tested: gentian root alone against placebo for appetite or indigestion; its effect on stomach acid in people; use in people with ulcers or reflux; long-term safety; interactions with medicines.
Safety unknowns: no pregnancy, breastfeeding or child data; the Ames signal for xanthones has not been followed up in people; the 2009 EU peptic ulcer contraindication was dropped in 2018 without a clear reason in the papers we read.
Not verified: the Commission E monograph, FDA, NCCIH, LiverTox, LactMed and WHO pages; the IUCN global listing and EU Habitats Directive text.

How new research is added

New studies are found by a saved PubMed search and are placed in a review queue. A person reads each one before it changes any evidence rating or safety wording. New publications never change ratings automatically.

Lab markers

What changed in blood or saliva tests during trials. A changed number is not the same as feeling or being healthier, and we give no "normal ranges".

Other 8

▲

Saliva production

Raised in trials

How much saliva the mouth makes in a set time.

Very low certainty

Results and what it means

Why it was measured

A quick, safe sign that the taste reflex has been triggered.

Statistical vs. clinical meaning

A short, expected taste response. It does not show better digestion.

Safety implication

None.

Study	Result	People	Product
²⁴	Gentian tincture 2% raised salivary secretion over 30 minutes compared with placebo and placebo with 7% alcohol; no difference at later times (as summarised by EMA; numbers not given).	24 healthy volunteers, crossover	Gentian tincture 2%

^{24 27}

▲

Stomach acid production

Raised in trials

Acid made by stomach cells; in cell work, an acid-uptake marker (aminopyrine ratio); in rats, stomach pH and secretion.

Very low certainty

Results and what it means

Why it was measured

It explains the digestive effect and the ulcer caution.

Statistical vs. clinical meaning

Lab and animal signals only. No modern human measurement of acid after gentian root alone was found.

Safety implication

More secretion is the reason to be careful with ulcers and reflux.

Study	Result	People	Product
³³	Aqueous gentian root extract raised the acid-production marker 1.7-fold at 100 micrograms/mL in isolated rat stomach cells (as summarised by EMA).	Rat parietal cells in a dish	Aqueous dry extract of gentian root
³⁵	Gentian extract raised gastric secretion in rats in a dose-dependent way; pH rose from 4.25 to 4.85 only at the 4% concentration (as summarised by EMA).	Rats	Gentian extract into the stomach

^{33 35 27}

▲

Resistance of small blood vessels after a bitter drink

Raised in trials

How tight the small blood vessels are, measured beat by beat with blood-pressure equipment.

Very low certainty

Results and what it means

Why it was measured

Used as a sign of a taste reflex reaching the circulation.

Statistical vs. clinical meaning

A short reflex. Blood pressure rise was no larger than with water alone.

Safety implication

People with blood-pressure problems should ask a doctor first.

Study	Result	People	Product
⁹	Gentian root in water (500 and 1500 mg in 100 mL) raised peripheral vascular resistance and lowered cardiac output, mainly stroke volume; capsules had no effect.	Healthy adults, n=12 for the water arms	Gentian root in 100 mL water

⁹

▼

Digestive symptom improvement (doctor rating)

Lowered in trials

A doctor's or patient's score for how much digestive symptoms improved.

Very low certainty

Results and what it means

Why it was measured

This is what people actually feel.

Statistical vs. clinical meaning

Open study without a placebo group; a large number but a weak design.

Safety implication

Adverse events 2.4% (flatulence, soft stools, cramps, nausea, one headache).

Study	Result	People	Product
⁴¹	Average symptom improvement 68% after 15 days; doctor ratings excellent 31%, good 55%, moderate 9%, inadequate 5% (as summarised by EMA).	205 people with mild digestive complaints (open study)	Gentian root dry extract capsules (2-3 times a day)

^{41 27}

▼

Sinus symptom score (Major Symptom Score)

Lowered in trials

A doctor's score of main sinus symptoms such as blocked nose, discharge and pressure.

Low certainty

Results and what it means

Why it was measured

Main outcome in the sinus trials.

Statistical vs. clinical meaning

A symptom score is a real outcome, but it is a combination product and the chronic trial missed its main target.

Safety implication

None specific.

Study	Result	People	Product
⁶	2.07 (SEM 0.18) with the five-plant extract vs 3.47 (SEM 0.28) with placebo after 15 days (p=0.0001; n=300 per protocol).	386 adults with acute viral rhinosinusitis	Sinupret extract dry dragees, five-plant combination
¹³	Not better than placebo on the planned primary measure at weeks 8 and 12; a post-hoc subgroup improved.	929 adults with chronic rhinosinusitis	BNO 1016 at two doses for 12 weeks

^{6 13}

▼

Antibiotic prescribing

Lowered in trials

How often doctors prescribed antibiotics during the study.

Low certainty

Results and what it means

Why it was measured

Many sinus infections are viral and antibiotics are often not needed.

Statistical vs. clinical meaning

Open-label, so doctors knew who got the extract, which can bias prescribing.

Safety implication

Never stop or withhold a prescribed antibiotic on your own.

Study	Result	People	Product
¹⁶	Antibiotic prescribing was 1.81-fold lower with the five-plant extract plus standard care than with standard care alone.	292 children aged 6 to 11 (open-label)	BNO 1012 plus standard symptom care

¹⁶

▼

Inflammation signals IL-6 and IL-8 in airway cells

Lowered in trials

Proteins released by cells during inflammation.

Not enough evidence

Results and what it means

Why it was measured

A lab sign of an anti-inflammatory action.

Statistical vs. clinical meaning

A cell signal; no clinical meaning shown.

Safety implication

None.

Study	Result	People	Product
²¹	Aqueous gentian root extract reduced LPS-induced IL-6 and IL-8 secretion and lowered IL6, CXCL8 and IL33 expression in human Calu-3 cells.	Human bronchial cells in a dish	Aqueous Gentiana lutea root extract, 0.1 to 12.5 mg/mL

²¹

▲

Mucus-clearing indicators in sinus cells

Raised in trials

Chloride secretion, cilia beating and surface-liquid depth, lab signs of mucus clearance.

Not enough evidence

Results and what it means

Why it was measured

Theory for how the combination might ease sinus congestion.

Statistical vs. clinical meaning

A lab signal for the mix, not gentian alone. Two authors hold a pending patent in this area.

Safety implication

None.

Study	Result	People	Product
²³	Chloride secretion 20.7 vs 6.4 microamps per cm2 in human sinonasal cells (p<0.05), with higher cilia beat frequency and liquid depth.	Human and mouse sinus-lining cells in a dish	Sinupret, five-plant combination

²³

Safety

What studies and official sources say about side effects, medicines and who should check first. Each point shows what kind of evidence it comes from.

Main points to know 9

Do not confuse yellow gentian with white hellebore (Veratrum album): the look-alike is poisonous. The EU assessment warns that Veratrum album has often been mistaken for Gentiana lutea. Before flowering the two plants look alike and often grow side by side in mountain meadows. Gentian leaves are opposite each other and its flowers are yellow; Veratrum leaves alternate along the stem and its flowers are white. Poisoning reports describe nausea, vomiting, tingling of the mouth, low blood pressure and a very slow heart rate, starting within minutes to an hour, usually after home-made gentian wine, schnapps or tea. In the case reports read, everyone recovered with hospital care, but one man had a heart rate of 35 and blood pressure of 50/30. Never dig or brew wild roots yourself. Case series ^{3 17 22 5 2 18 27 32}
Not recommended in pregnancy or breastfeeding. The EU monograph says safety in pregnancy and breastfeeding has not been established, no fertility data exist, and use is not recommended. The EU assessment says tests of reproductive toxicity were not done. We found no human or animal reproduction study of gentian root. Authoritative guidance ^{29 27}
Not recommended for children and teenagers under 18. The EU monograph says use under 18 has not been established because of lack of data and is not recommended. Some older German products listed use from 12 years, but the current EU view is more cautious. Authoritative guidance ^{29 27}
Stomach ulcers and heightened stomach acid: ask a doctor first. Gentian root is used because bitters raise saliva and stomach juice, and in cells and rats it raised acid-linked secretion. The first EU monograph (2009) listed peptic ulcer as a contraindication; the 2018 revision dropped it and lists only allergy. We found no study of gentian in people with ulcers or reflux. Because of the way it works, anyone with a stomach or duodenal ulcer, reflux, heartburn or gastritis should talk to a doctor or pharmacist before using it. Do not rely on gentian for ulcer pain; see a doctor. Pharmacological theory ^{28 29 27 33 35}
Headache and mild stomach upset can occur. In the one open study (205 people, 15 days), 2.4% reported flatulence, soft stools, stomach cramps or nausea, and one person had a headache. The EU report says these cannot be tied to the extract because they are also symptoms of the condition. The first EU monograph said headache may occur (frequency unknown), uncommon stomach effects, and rarely a fast heartbeat and itching. The 2018 monograph says undesirable effects are none known. Authoritative guidance ^{41 28 29}
Possible gene-damage signal in a bacterial test of two xanthones. Gentisin and isogentisin, two xanthones in gentian root, were mutagenic in the Ames bacterial test; they made up about 76% of the mutagenic activity in a root extract. The EU report says genotoxicity tests of tea and other herbal preparations are missing, and so it does not recommend gentian root for the EU list of traditional herbal substances. No human harm has been reported, but this is another reason to keep to short use and a doctor's advice. Laboratory research ^{11 27 29}
Short use only; see a doctor if symptoms last more than 2 weeks. The EU monograph says to see a doctor or qualified health professional if symptoms last more than 2 weeks, or if they get worse. Lasting loss of appetite or indigestion can signal a condition that needs a diagnosis. Authoritative guidance ²⁹
Tinctures and liqueurs contain alcohol. The EU monograph requires ethanol labelling for tinctures and liquid extracts. The tincture is made with 70% ethanol and the liquid extract with 45%. Alcohol matters for children, pregnancy, driving, people avoiding alcohol and people taking medicines that react with alcohol. Authoritative guidance ²⁹
Wild yellow gentian is a protected, over-collected plant. The EU assessment says the plant is under wildlife protection and is mostly grown on farms in Germany and France. North Macedonia's national Red List rates the local subspecies Vulnerable, mainly from over-harvesting of whole plants for medicine. A search summary says the global IUCN status is Least Concern (not checked at the primary page). Choose farm-grown material and do not collect wild plants. Authoritative guidance ^{27 39 25}

Side effects 8

Effect	How often	Severity and recovery	Evidence
Headache The 2018 EU monograph lists no known undesirable effects; the earlier one said headache may occur.	1 of 205 people in one open study; frequency "not known" in the 2009 EU monograph	mild Not stated	Authoritative guidance ^{41 28}
Flatulence, soft stools, stomach cramps, nausea EMA says it cannot tell whether these were caused by the extract or were part of the digestive complaint being treated.	2.4% of 205 people had adverse events (flatulence, soft stools, stomach cramps and nausea or stomach spasm, one patient each)	mild Not stated	Authoritative guidance ^{41 27}
Fast heartbeat (tachycardia) and itching Removed from the 2018 monograph.	"Rare" in the 2009 monograph; no number	mild Not stated	Authoritative guidance ²⁸
High blood pressure (one report) The person already had high blood pressure; details are missing, so a causal link could not be judged.	One case in more than 30 years in the German drug-safety database (2017 search)	unknown Not stated	Case report ²⁷
Allergic reaction Hypersensitivity is the one contraindication in the 2018 EU monograph. No cases with numbers were found.	Not established	unknown Not stated	Authoritative guidance ²⁹
Short-lived blood-vessel tightening after bitter gentian water A reflex measured by equipment; no one was reported ill.	In a physiology study of healthy volunteers (n=12 for the water arms)	mild Brief, within minutes	Controlled trial ⁹
Slightly lower red blood cell count in rabbits (3 days) Rabbit study as summarised by EMA; no abnormal blood tests otherwise. Not shown in people.	Not established	mild Not stated	Animal research ²⁷
Poisoning when white hellebore is mixed in by mistake This is a look-alike plant problem, not an effect of gentian itself.	Case reports only; no rate	severe All recovered within hours to a day with hospital care in the reports read	Case series ^{3 17 22 5 2 18}

Liver

We found no published human case of liver injury from yellow gentian root. The EU assessment lists no liver problems, and the open study in 205 people (as summarised by EMA) did not report liver findings. The NIH LiverTox entry could not be confirmed (no entry was found in a search), so its likelihood score is not given. Animal work with gentiopicroside and other gentian species points to liver protection, not injury, but that is not evidence for people. Chinese gentian (long dan cao) and large-leaf gentian (qin jiao) are different species and are not covered by this statement. ^{27 34}

How often. No frequency of human liver injury could be given; not finding reports is not proof of safety.

Monitoring. No agency monitoring advice was found. Stop and seek care for dark urine, yellow skin or eyes, or severe belly pain.

This is a safety connection. It is not evidence that Gentian supports liver health.

Medicines and supplements 6

With	Why it matters	Importance	Evidence	What to do
No interactions reported (EU monograph) general	The 2018 EU monograph says "none reported", and the EU assessment says no data are available on interactions.	Absence of reports is not proof that no interaction exists; gentian root has been studied very little.	Authoritative guidance Not enough evidence ^{29 27}	Tell a doctor or pharmacist about every medicine and supplement you take.
Medicines that lower or block stomach acid (proton-pump inhibitors, H2 blockers, antacids) prescription	Theory: gentian is used to increase saliva and stomach secretion, which is the opposite aim. No study tested this.	Unknown. Possible reduced benefit of acid-lowering medicine, or a reason to use gentian less in reflux.	Pharmacological theory Very low certainty ^{27 33}	If you take acid-lowering medicine for ulcers or reflux, ask your doctor before using gentian.
Blood pressure medicines or high blood pressure prescription	In 12 healthy volunteers, bitter gentian water briefly raised resistance in small blood vessels and lowered cardiac output. The EU report also records one German case of high blood pressure after a solid gentian product in a person with known high blood pressure; cause unproven.	Unknown. The change was brief, but there is no study in people with hypertension.	Controlled trial Very low certainty ^{9 27}	If you have high blood pressure or take blood-pressure or heart medicines, tell your doctor first.
Alcohol-sensitive medicines (disulfiram, metronidazole, others) with tinctures and liqueurs prescription	Gentian tinctures contain 45 to 70% ethanol in the EU monograph; the alcohol, not the plant, is the issue.	Depends on the medicine and the amount of alcohol.	Authoritative guidance Not enough evidence ²⁹	Check the label for alcohol and ask a pharmacist; choose a tea or alcohol-free form if you take such medicines.
Iron supplements and iron absorption supplement	We found no source that shows gentian changes how iron is absorbed. Search summaries (not read in full) repeat a traditional idea that gentian helps iron absorption by stimulating digestion, and disagree on whether the root contains tannins, which can reduce iron uptake. Neither claim is backed by a study we read.	Not established either way.	Traditional use Not enough evidence ²⁷	Do not use gentian to treat iron-deficiency anaemia; see a doctor. If you take iron, follow your doctor's advice on timing.
Other bitter or digestive herbs and Sinupret-type combinations herb	Gentian is often combined with primula, sorrel, elderflower, verbena and other bitters, so effects and side effects of the mix cannot be separated.	Unknown.	Other Not enough evidence ^{27 10}	Count every herb in a combination product when checking for allergy or interactions.

Who should check first 7

Situation	Advice	Evidence
Allergy to gentian root or a past reaction to a gentian product	Do not use. This is the only contraindication in the 2018 EU monograph.	Authoritative guidance ²⁹
Stomach or duodenal (peptic) ulcer, or a lot of stomach acid, reflux or gastritis	Ask a doctor first. The 2009 EU monograph listed peptic ulcer as a contraindication; the 2018 revision does not. The caution stays because gentian is meant to stimulate stomach secretions.	Pharmacological theory ^{28 29 27}
Pregnancy	Not recommended; safety has not been established and reproductive tests were not done.	Authoritative guidance ^{29 27}
Breastfeeding	Not recommended; no data. We could not confirm a LactMed entry.	Authoritative guidance ²⁹
Children and teenagers under 18	Not recommended; no adequate data.	Authoritative guidance ^{29 27}
Home-made or wild-picked gentian roots, wine, schnapps or teas	Do not use. Veratrum album (white hellebore) is a poisonous look-alike and has been mixed in by mistake.	Case series ^{3 17 22 5 2 18}
High blood pressure or heart rhythm problems	Ask a doctor first; one blood-pressure report and one small physiology study exist, and the look-alike poison affects heart rate.	Pharmacological theory ^{27 9}

Overdose, product quality and regulators

Summary. Gentian root has low acute toxicity in the animal data reported by the EU, but the data are old and limited. The real poisoning risk is the look-alike Veratrum album. The EU says tests for reproductive toxicity and cancer were not done, and the Ames test of two xanthones was positive.

Animal. The LD50 of gentian root is unknown. In mice the acute oral LD50 of a gentian extract (37% ethanol, bitterness value 200 units per gram) was 25 mL/kg, the same as for 30% ethanol alone. Rats given a gentian, chamomile and liquorice combination for 13 weeks showed no treatment-related harm. Rabbits given gentian extract for 3 days showed no toxicity apart from slightly lower red blood cell counts. All as summarised by the EU report.

Human doses studied. Capsules of dry extract (average 4.8 capsules of 120 mg a day, equal to about 2.9 g of root) for 15 days in 205 people.

High dose or long term signals. No overdose has been reported (EU monograph). No long-term human safety study was found.

Overdose response. No case of gentian overdose was found in the sources read.

Genotoxicity. Gentisin and isogentisin from root extract were mutagenic in the Ames test (Salmonella TA100 with liver enzymes); other xanthones in gentian root also scored positive. No tests were done on tea, tincture or dry extract as used by people, which is why the EU did not recommend a list entry.

Toxic plant parts. No toxic part of Gentiana lutea was identified. The poisonous plant is Veratrum album, which holds more than 200 alkaloids (protoveratrines A and B were measured in one drink; veratridine, cevadine and jervine are others tested for). Opening of voltage-gated sodium channels is thought to be a main way they cause harm.

The proven problem is mix-ups with Veratrum album in home-made and wild-picked gentian products. Chemical content also varies a lot between commercial drinks.

White hellebore (Veratrum album) taken for yellow gentian. Reports from several European countries describe poisonings after home-made gentian wine (5 people, all wines contained Veratrum alkaloids), gentian spirit (2 men, heart rates 42 and 45), a gentian-labelled drink (a man with heart rate 35 and blood pressure 50/30; protoveratrine A 20.4 mg/L and B 13.7 mg/L in the drink), an infusion, and herb tea collected by 11 children (all recovered within 10 hours). EMA says most gentian poisoning cases were due to adulteration or mistaken use of Veratrum album. ^{3 17 22 5 2 18 27}

Large differences between gentian drinks. In 10 commercial liquid products, 7 liqueurs varied widely in bitter compounds and 3 clear spirits had no measurable marker compounds; 13 root batches held 2.1 to 5.6% gentiopicroside. ⁴

Cultivated vs wild root. In 20 root samples from cultivated, wild and commercial sources the main bitter compound ranged from 1.85 to 3.97%. ¹²

Body	Action	Date
European Medicines Agency, HMPC (European Union)	European Union herbal monograph on Gentiana lutea L., radix (EMA/HMPC/607861/2017): traditional use for temporary loss of appetite and mild dyspeptic/gastrointestinal disorders; contraindication hypersensitivity; not recommended under 18, in pregnancy or breastfeeding; see a doctor if symptoms last over 2 weeks. Ph. Eur. monograph 0392 applies. source	2018-11-20
European Medicines Agency, HMPC (first version, superseded) (European Union)	Community herbal monograph, first version: contraindications hypersensitivity and peptic ulcer; headache may occur; tachycardia and itching rare. source	2009-11-12
European Medicines Agency, HMPC assessment report (European Union)	Draft assessment report (27 March 2018): sufficient traditional use; not recommended in pregnancy, lactation and under 18; Ames-test concern for xanthones; no EU list entry recommended; Veratrum album look-alike warning. source	2018-03-27

When to get medical help

After drinking home-made gentian wine, schnapps, tea or an infusion, or any gentian drink of unknown origin: nausea or repeated vomiting, tingling or numbness of the mouth, dizziness, fainting, a very slow pulse or a sudden drop in blood pressure. Call emergency services and say it may be white hellebore (Veratrum) poisoning.
Vomiting blood, black tarry stools or sudden severe stomach pain: get emergency care; this can be a bleeding ulcer, and gentian should not be used as treatment.
Swelling of the face, lips or throat, hives or trouble breathing after taking gentian: seek emergency care (allergy).
Loss of appetite or indigestion that lasts more than 2 weeks, or comes with weight loss, black stools, or trouble swallowing: see a doctor; do not keep self-treating.
Yellow skin or eyes, dark urine or severe belly pain while taking any herbal product: stop it and see a doctor.

Stop the supplement and contact a clinician or emergency service. In the US, Poison Control is 1-800-222-1222.

General information only, not medical advice. Ask a clinician or pharmacist before use, especially with medicines, in pregnancy or with a health condition. See the Natural Remedy Safety guide.

Frequently asked questions

What is gentian root used for?

Gentian root is a bitter tonic used in Europe for temporary loss of appetite and mild indigestion, with fullness and bloating. The EU accepts these uses only as traditional ones, based on long use, not on controlled trials. It is also in some bitter liqueurs and, with four other plants, in sinus products. If symptoms last more than 2 weeks, see a doctor.

^{29 27}

Does gentian really help appetite or indigestion?

We cannot say. No controlled trial of gentian root alone has tested appetite (insufficient). For mild indigestion there is one open study of 205 people with no placebo group, reporting a 68% average improvement (very low). With no comparison group, it cannot separate a real effect from natural recovery or expectation.

^{41 27 29}

Is yellow gentian the same as Chinese gentian (long dan cao)?

No. Long dan cao comes from Gentiana scabra, G. manshurica, G. triflora or G. rigescens, and qin jiao from G. macrophylla and relatives. They are different plants used in a different tradition. They share gentiopicroside, but results for yellow gentian (Gentiana lutea) should not be assumed for them, and the reverse.

^{27 30}

Can gentian be confused with a poisonous plant?

Yes. White hellebore (Veratrum album) has often been mistaken for yellow gentian, especially before flowering. Gentian leaves are opposite and its flowers yellow; Veratrum leaves alternate and its flowers are white. Poisoning from home-made gentian wine, spirit or tea has caused vomiting, a slow heartbeat (as low as 35 beats a minute) and low blood pressure. All recovered with hospital care in the reports read. Never use wild-picked or home-made roots, and call emergency services if you feel ill after such a drink.

^{3 17 22 5 2 18 27}

Is gentian safe in pregnancy or breastfeeding?

It is not recommended. The EU says its safety has not been established, no fertility data exist, and tests on reproduction were not done. We found no human or animal study to show it is safe.

^{29 27}

Can children take gentian?

Not under 18, according to the EU monograph, because there are no adequate data. Tinctures and liqueurs also contain alcohol.

^{29 27}

Is gentian safe with stomach ulcers or acid reflux?

Ask a doctor first. Gentian is used because bitters raise saliva and stomach juice, and in rat cells and rats it raised acid-linked secretion. The first EU monograph (2009) listed peptic ulcer as a contraindication; the 2018 revision lists only allergy. No study tested gentian in people with ulcers or reflux, so the caution rests on how it works.

^{28 29 27 33 35}

Does gentian cause headaches or other side effects?

Sometimes. In the one open study of 205 people, 2.4% reported flatulence, soft stools, stomach cramps or nausea, and one person had a headache; EMA says these cannot be tied to the extract. The 2009 EU monograph said headache may occur. The 2018 monograph lists no known undesirable effects. Rare reports include a fast heartbeat, itching and one case of high blood pressure.

^{41 28 29 27}

Does gentian help sinusitis?

The evidence is for Sinupret, a five-plant mix that includes gentian, not for gentian alone. Several trials in acute sinusitis favour the mix over placebo or no treatment (low), but a large trial in chronic sinusitis missed its main target (very low). Many trials are open-label or likely industry-linked. See a doctor for severe or lasting sinus symptoms.

^{10 6 16 13 7}

Does gentian interact with medicines or iron?

The EU monograph says no interactions have been reported, but gentian has been studied very little. In theory it could oppose acid-lowering medicines, and a small study found a brief blood-vessel reflex, so tell your doctor if you have high blood pressure. Tinctures contain alcohol. No study we read shows that gentian changes iron absorption; traditional claims that it helps iron are unverified. Do not use it to treat anaemia.

^{29 27 9}

Is wild yellow gentian endangered?

It is protected and over-collected in places. The EU assessment says the plant is under wildlife protection and is mostly farmed in Germany and France. North Macedonia rates the local subspecies Vulnerable because of over-harvesting for medicine. A search summary says the global IUCN status is Least Concern (not checked at the primary source). Choose farm-grown material and do not dig wild plants.

^{27 39 25}

Is gentian good for the liver?

Not shown in people. Mice given purified gentiopicroside had less liver injury from a liver poison, but that is animal work on one compound. We found no human liver-injury report for gentian root and no human trial of liver benefit. Do not use it for liver disease. Chinese gentian (long dan cao) is a different plant used in Chinese medicine for the liver.

^{34 1 27}

Explore by health goal

Digestive Support Immune Support Gut Health Inflammation Balance Healthy Aging Liver Support

Editorial transparency

Written by: AlternativeMed editorial team. Research compiled with AI assistance, then checked against PubMed records.
Medical review: None. This page has not been reviewed by a physician or pharmacist.
First published: 2026-10-25
Last substantive update: 2026-10-25
How we research: We searched PubMed, read the full EU herbal monograph (2018), the full EU draft assessment report (2018) and the clinical sections of the superseded 2009 monograph, and checked plant names in GBIF and NCBI Taxonomy and compounds in PubChem. Nearly all studies were read as PubMed abstracts only; several older human and animal studies are known only through the EU report. Not verified: the Commission E monograph, FDA, NCCIH, LiverTox, LactMed and WHO statements, the IUCN global assessment (search summaries only) and the EU Habitats Directive text. Certainty ratings are the compilers' own reading, not formal GRADE.
How we rate evidence: See "How we rate evidence" in the Evidence tab.
Independence: No product is promoted on this page. No affiliate links are shown. If one is added later it will be labelled and kept apart from the evidence.

Sources 41

Each source was opened and checked. Where we read only the abstract, it says so. The small numbers in the text point here.

Antoniadi L, Bartnik M, Angelis A et al.. Gentiopicroside-An Insight into Its Pharmacological Significance and Future Perspectives.. Cells. 2023. PMID 38201274. DOI 10.3390/cells13010070. (abstract)
Festa M, Andreetto B, Ballaris MA et al.. [A case of Veratrum poisoning].. Minerva Anestesiol. 1996. PMID 9045097. (abstract)
Garnier R, Carlier P, Hoffelt J et al.. [Acute dietary poisoning by white hellebore (Veratrum album L.). Clinical and analytical data. A propos of 5 cases].. Ann Med Interne (Paris). 1985. PMID 4073696. (abstract)
Gibitz-Eisath N, Seger C, Schwaiger S et al.. Simultaneous Quantitative Analysis of the Major Bioactive Compounds in Gentianae Radix and its Beverages by UHPSFC-DAD.. J Agric Food Chem. 2022. PMID 35695390. DOI 10.1021/acs.jafc.2c01584. (abstract)
Grobosch T, Binscheck T, Martens F et al.. Accidental intoxication with Veratrum album.. J Anal Toxicol. 2008. PMID 19021933. DOI 10.1093/jat/32.9.768. (abstract)
Jund R, Mondigler M, Steindl H et al.. [Clinical efficacy of a herbal drug combination in acute viral rhinosinusitis].. MMW Fortschr Med. 2015. PMID 26013113. DOI 10.1007/s15006-015-2934-4. (abstract)
Koch AK, Klose P, Lauche R et al.. [A Systematic Review of Phytotherapy for Acute Rhinosinusitis].. Forsch Komplementmed. 2016. PMID 27404100. DOI 10.1159/000447467. (abstract)
Kostić M, Filipović Tričković J, Radošević K et al.. Gentiana lutea Root Extract Attenuates Radiation-Induced Damage in Human PBMCs in vitro.. Dose Response. 2026. PMID 41884402. DOI 10.1177/15593258261435484. (abstract)
McMullen MK, Whitehouse JM, Whitton PA et al.. Bitter tastants alter gastric-phase postprandial haemodynamics.. J Ethnopharmacol. 2014. PMID 24802704. DOI 10.1016/j.jep.2014.04.041. (abstract)
Melzer J, Saller R, Schapowal A et al.. Systematic review of clinical data with BNO-101 (Sinupret) in the treatment of sinusitis.. Forsch Komplementmed. 2006. PMID 16645287. DOI 10.1159/000091969. (abstract)
Morimoto I, Nozaka T, Watanabe F et al.. Mutagenic activities of gentisin and isogentisin from Gentianae radix (Gentianaceae).. Mutat Res. 1983. PMID 6338357. DOI 10.1016/0165-1218(83)90101-5. (abstract)
Mustafa AM, Caprioli G, Ricciutelli M et al.. Comparative HPLC/ESI-MS and HPLC/DAD study of different populations of cultivated, wild and commercial Gentiana lutea L.. Food Chem. 2015. PMID 25529701. DOI 10.1016/j.foodchem.2014.11.089. (abstract)
Palm J, Steiner I, Abramov-Sommariva D et al.. Assessment of efficacy and safety of the herbal medicinal product BNO 1016 in chronic rhinosinusitis.. Rhinology. 2017. PMID 28214913. DOI 10.4193/Rhin16.103. (abstract)
Passali D, Loglisci M, Passali GC et al.. A prospective open-label study to assess the efficacy and safety of a herbal medicinal product (Sinupret) in patients with acute rhinosinusitis.. ORL J Otorhinolaryngol Relat Spec. 2015. PMID 25661190. DOI 10.1159/000370123. (abstract)
Ponticelli M, Lela L, Moles M et al.. The healing bitterness of Gentiana lutea L., phytochemistry and biological activities: A systematic review.. Phytochemistry. 2023. PMID 36423749. DOI 10.1016/j.phytochem.2022.113518. (abstract)
Popovych VI, Beketova HV, Koshel IV et al.. An open-label, multicentre, randomized comparative study of efficacy, safety and tolerability of the 5 plant - extract BNO 1012 in the Delayed Antibiotic Prescription Method in children, aged 6 to 11 years with acute viral and post-viral rhinosinusitis.. Am J Otolaryngol. 2020. PMID 32593046. DOI 10.1016/j.amjoto.2020.102564. (abstract)
Quatrehomme G, Bertrand F, Chauvet C et al.. Intoxication from Veratrum album.. Hum Exp Toxicol. 1993. PMID 8096707. DOI 10.1177/096032719301200203. (abstract)
Rauber-Lüthy C, Halbsguth U, Kupferschmidt H et al.. Low-dose exposure to Veratrum album in children causes mild effects--a case series.. Clin Toxicol (Phila). 2010. PMID 20170391. DOI 10.3109/15563650903575243. (abstract)
Sen'kevich OA, Sidorenko SV, Ditrikh OA. [Comparative efficacy of various treatment regimens for children 2-5 years old with symptoms of acute viral rhinosinusitis].. Vestn Otorinolaringol. 2021. PMID 33720651. DOI 10.17116/otorino20218601146. (abstract)
Wiedermann CJ, Scheer M, Pycha A. Gentian root bitters for the rapid suppression of post-propofol singultus: a case report.. Wien Klin Wochenschr. 2026. PMID 40900241. DOI 10.1007/s00508-025-02607-6. (abstract)
Wildhaber J, Karakocak BB, de Almeida MS et al.. Safety and anti-inflammatory activity of Gentiana lutea L. in human bronchial epithelial cell cultures.. J Ethnopharmacol. 2026. PMID 41580168. DOI 10.1016/j.jep.2026.121254. (abstract)
Zagler B, Zelger A, Salvatore C et al.. Dietary poisoning with Veratrum album--a report of two cases.. Wien Klin Wochenschr. 2005. PMID 15773425. DOI 10.1007/s00508-004-0291-x. (abstract)
Zhang S, Skinner D, Hicks SB et al.. Sinupret activates CFTR and TMEM16A-dependent transepithelial chloride transport and improves indicators of mucociliary clearance.. PLoS One. 2014. PMID 25117505. DOI 10.1371/journal.pone.0104090. (abstract)
. Borgia M et al. Controlled trials of a herbal preparation containing gentian tincture (1981), as summarised in the EMA assessment report. . . (summary-only)
. Search-result summaries of IUCN global status and Habitats Directive listing for Gentiana lutea (secondary sources, not opened in full). . . (summary-only)
. El-Sedawy et al. Transformation of gentiopicroside by human intestinal bacteria (1989), as summarised in the EMA assessment report. . . (summary-only)
. EMA HMPC. Assessment report on Gentiana lutea L., radix (EMA/607863/2017), draft of 27 March 2018. . . (full-text)
. EMA HMPC. Community herbal monograph on Gentiana lutea L., radix, first version (adopted 12 November 2009); superseded. . . (full-text)
. EMA HMPC. European Union herbal monograph on Gentiana lutea L., radix (EMA/HMPC/607861/2017), adopted 20 November 2018. . . (full-text)
. GBIF Backbone: Gentiana scabra Bunge (7270205), G. manshurica Kitag. (3841132), G. macrophylla Pall. (7761022). . . (full-text)
. GBIF Backbone: Gentiana lutea L. (usageKey 3170040). . . (full-text)
. GBIF Backbone: Veratrum album L. (usageKey 2742119). . . (full-text)
. Gebhardt R. Aqueous gentian extract and acid production in isolated rat stomach cells (1997), as summarised in the EMA assessment report. . . (summary-only)
. Kondo Y et al. Gentiopicroside and liver injury in mice (1994), as summarised in the EMA assessment report. . . (summary-only)
. Leslie GB. Gentian extract and gastric secretion in rats (1978), as summarised in the EMA assessment report. . . (summary-only)
. Mahady GB et al. Extracts of traditional digestive remedies against Helicobacter pylori (2005), as summarised in the EMA assessment report. . . (summary-only)
. NCBI Taxonomy: Gentiana lutea (taxid 38851), yellow gentian. . . (full-text)
. PubChem compound records for gentian root constituents (queried by name 2026-10-25). . . (full-text)
. National Red List of North Macedonia: Gentiana lutea (ssp. symphyandra), assessed November 2019. . . (full-text)
. Wang et al. Pharmacokinetics of gentiopicroside from Gentiana decoction, pure compound and Longdan Xiegan Tang in rats (2007), as summarised in the EMA assessment report. . . (summary-only)
. Wegner C. Open observational study of gentian root dry extract in 205 people with dyspeptic complaints (1997), as summarised in the EMA assessment report. . . (summary-only)

Where to buy

Check the label first. Whatever you buy, look for these:

The plant part and the extract type or ratio on the label
A standardized amount of the active compounds, where relevant
A third-party testing mark (USP, NSF or ConsumerLab)
Interactions: ask a pharmacist if you take medicines, are pregnant or have a medical condition

Talk to a pharmacist or doctor before you start any supplement, especially if you take medicines. See the Safety tab for interactions.

Browse Gentian on Amazon

Amazon · Several brands to compare

Shop Gentian on Amazon

Support our free guides: as an Amazon Associate we earn from qualifying purchases. Full disclosure.

Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.