Nuts & Seeds · Seed
Lotus Seeds
Nelumbo nucifera · also called Sacred lotus seed, lian zi, Nelumbinis semen, semilla de loto (Spanish)
Lotus seeds are the seeds of the sacred lotus, eaten dried and cooked in Asian soups and sweets. An ounce has about 94 calories and 4.4 g of protein. Human research on eating them is very thin: one small meal test found a slow blood sugar rise, and other findings come from extracts, rats or mice. The main cautions are mould toxins in poorly stored seeds and their high potassium and phosphorus for people with kidney disease.
General information, not medical advice. Last substantive update · Not medically reviewed. A named clinician has not signed off on this page. How this page is made
About Lotus Seeds
Lotus seeds are a protein- and mineral-rich seed eaten cooked in Asian dishes. Research on eating them is very thin, so they are best seen as an ordinary food, not a proven remedy.
What it is
Lotus seeds come from the sacred lotus (Nelumbo nucifera), a water plant. The kernel from the seed pod is sold dried, whole or split, and cooked in soups, sweets and pastes.
Dried seeds give about 332 kcal and 15.41 g of protein per 100 g. A 28 g ounce gives about 94 kcal, 4.4 g protein, 59 mg magnesium and 388 mg potassium (USDA). They are not the same as makhana (fox nuts), which come from a different plant, Euryale ferox, or blue lotus tea, which is a water lily flower.
What the research shows
The only study of the cooked seed in people is a small meal test in 10 healthy adults, which found a low glycemic index.
Trials on mood and sleep used extracts, one mixed with Rhodiola. Blood pressure and diarrhoea results are in rats and mice. A review lists many other effects from the lab, which are not shown in people.
At a glance
Traditional uses history, not proof
- Cooked in soups, sweet soups and pastes in Asian cooking
- Used in traditional Chinese medicine as Nelumbinis semen
Studied for research
- Blood sugar response after a cooked meal, very low certainty
- Blood pressure, rat extract only, insufficient
- Low mood and stress, extract trial, very low certainty
- Sleep, mixed extract, very low certainty
- Diarrhoea, mice only, insufficient
Main compounds
- Starch and protein (about 15 g protein per 100 g dried)
- Minerals: manganese, magnesium, phosphorus, potassium
- Alkaloids in the green embryo, studied in the lab
Common forms
- Dried seeds, soaked and cooked (the form the nutrition figures describe)
- Split or cored seeds
- Lotus seed paste and canned desserts, often with added sugar
- Water extracts (not the same as the food)
Research links: USDA FoodData Central: dried lotus seeds · Lotus seeds review (Food Science & Nutrition, 2021) · Glycemic response trial (Nutrients, 2019) · WHO: Mycotoxins · Research Library · Genes & Biomarkers Library
What it is and its history
- Accepted scientific name
- Nelumbo nucifera
- Naming authority
- Gaertn. (GBIF accepted, usageKey 2882449)
- Common names
- Lotus seed (English); Sacred lotus seed (English); Lian zi (Nelumbinis semen) (Chinese); Semilla de loto (Spanish)
- Family or group
- Nelumbonaceae (lotus family). Makhana comes from Euryale ferox in the water lily family, a different plant.
- Classification
- Plantae > Proteales > Nelumbonaceae > Nelumbo > Nelumbo nucifera
- Look-alikes and adulterants
- Makhana or fox nut (Euryale ferox); Blue lotus (a water lily flower, not this seed)
Photographs
Traditional use and history history, not clinical proof
| Tradition or era | Documented use | Source |
|---|---|---|
| Asian cooking and traditional Chinese medicine | A 2021 review says lotus seeds have been used as a vegetable, functional food and medicine for 7,000 years; the claim is the review's own and was not independently checked. | p34262752 |
Traditional use shows how it was used. It does not show that it works or is safe today.
What is inside, and how it may work
What it 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 |
|---|---|---|---|---|
| Alkaloids in the green embryo (for example neferine) | alkaloids | Embryo | Studied in the lab; no human food data. 2 | Lab and animal |
| Starch | carbohydrate | Kernel About 64 g carbohydrate per 100 g dried (USDA) | Digests slowly in one small trial. 6 12 | Small human trial |
Mechanisms, receptors and pathways
| Target or pathway | Gene or receptor | What was found | Level |
|---|---|---|---|
| Nitric oxide and blood-pressure hormone system (rats, extract) | Reported in rats given an extract; not tested for the food. 8 | Animal research |
Absorption, metabolism and elimination
- Absorption
- Not researched.
- Distribution
- Not found.
- Metabolism
- Not found.
- Elimination
- Not found.
- Bioavailability
- Not established.
Isolated compounds versus whole extracts
The mood and sleep trials used extracts, and the blood pressure and gut studies used extracts in animals. None of them tests a bowl of cooked lotus seeds. Only the glycemic study used the cooked seed.
Nutritional composition
Per 100 g of dried lotus seeds (USDA FoodData Central, SR Legacy, as shown on the existing page): 332 kcal, 15.41 g protein, 1.97 g fat and 64.47 g carbohydrate. A 28 g (1 ounce, about 42 seeds) portion gives about 94 kcal, 4.4 g protein, 0.66 mg manganese, 59 mg magnesium, 177 mg phosphorus and 388 mg potassium. USDA lists no fibre value for this item. Values are for dried seeds; cooked seeds hold water and have less per gram. Candied seeds, pastes and canned desserts often have added sugar. Values vary with variety and storage.
3 very low certainty3 not enough evidence
What was looked at
The 6 benefits and uses checked for Lotus Seeds, each with how strong the evidence is. Tap one to open it.
- Blood sugar response after a meal (cooked lotus seed)Very low certainty
- Blood pressure (lotus seed extract in rats)Not enough evidence
- Low mood and stress (water extract of lotus seed)Very low certainty
- Sleep quality (lotus plus Rhodiola extract)Very low certainty
- Diarrhoea (water extract in mice)Not enough evidence
- Cancer, liver, anti-ageing, infection and other claimsNot enough evidence
Lab markers tracked in the studies
Glycemic index (one meal)Blood pressure in rats given an extractDepression and stress scores (extract, 2 weeks)Sleep scores (combination extract)
What is Lotus Seeds good for?
The studied uses and how strong the evidence is. Almost all of it is early: one small meal test, extracts and animal work. Eating lotus seeds is not shown to treat any condition.
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.
Blood sugar response after a meal (cooked lotus seed)
Very low certaintyIn a small crossover trial, ten healthy adults ate pre-soaked, cooked lotus seed. Their blood sugar rose slowly, giving a low glycemic index. This was a single meal test, not a long-term trial.
1 studiesPre-soaked, cooked dried lotus seed. The trial also found pre-soaking…
Studies, doses and limits
What the trials found
A 2019 randomised crossover trial in ten healthy adults compared six cooked starchy foods, each cooked two ways.
Results
Lotus seed and adzuki bean meals had a low glycemic index (21 to 51). Other starchy foods were close to rice (83 to 109).
Effect sizes as reported
Glycemic index 21 to 51 for lotus seed; hydrolysis index 37.7% to 61.1% (lotus seed and adzuki bean).
Why this rating
Ten healthy people, one meal each, one research group. It does not show effects in people with diabetes, and says nothing about long-term eating.
Form and dose studied
Pre-soaked, cooked dried lotus seed. The trial also found pre-soaking raised rapidly digestible starch.
Who was studied
Healthy adults in China.
Limits
Tiny trial. Glycemic index is a one-meal measure. Candied seeds and pastes with added sugar were not tested.
Why researchers looked
Lotus seed is a starchy food, so researchers asked how fast it raises blood sugar.
Traditional use
Lotus seed has long been eaten in Asian soups and sweets. Traditional use is not evidence.
Proposed mechanism Preliminary mechanism
Starch in the seed seems to digest slowly. The authors tested digestion in a test tube, not in the body in detail.
A proposed mechanism does not show that the effect happens in people.
None specific to this finding.
Blood pressure (lotus seed extract in rats)
Not enough evidenceIn rats with drug-induced high blood pressure, a lotus seed extract lowered blood pressure. No trial has tested eating lotus seeds for blood pressure in people.
1 studiesExtract given by mouth to rats; no dose advice for people.
Studies, doses and limits
What the trials found
No human trial was found.
Results
A 2025 rat study found the extract reduced blood pressure and that a low dose with the drug captopril worked about as well as captopril.
Effect sizes as reported
No human numbers.
Why this rating
Animal study of an extract. Rat results often do not carry over to people, and a bowl of seeds is not the same product.
Form and dose studied
Extract given by mouth to rats; no dose advice for people.
Who was studied
Rats.
Limits
Not a food trial. Do not use as a reason to change blood pressure medicine.
Why researchers looked
Lotus seed is used in traditional Asian medicine for blood pressure.
Traditional use
Described in the study as a traditional use.
Proposed mechanism Preliminary mechanism
The authors report more nitric oxide, less oxidative stress and less activity of a blood pressure hormone system in the rats.
A proposed mechanism does not show that the effect happens in people.
People who take blood pressure medicine should ask a pharmacist before changing anything.
Low mood and stress (water extract of lotus seed)
Very low certaintyIn a two-week trial of 45 adults with depression, a standardised water extract of lotus seed gave better scores than placebo at the lower of two amounts. This was an extract, not the food, and the trial was small and short.
1 studiesStandardised water extract of lotus seed, not the food.
Studies, doses and limits
What the trials found
A 2022 randomised, double-blind, placebo-controlled trial in 45 adults diagnosed with depressive disorders.
Results
Beck depression and stress scores improved against placebo in the lower-amount group (p<0.05) after two weeks. Authors call the result preliminary.
Effect sizes as reported
Significant (p<0.05) in the lower-amount group; the abstract gives no effect-size numbers.
Why this rating
Small trial, two weeks, one standardised extract, no follow-up.
Form and dose studied
Standardised water extract of lotus seed, not the food.
Who was studied
Adults with depressive disorders in Korea.
Limits
Not a test of eating lotus seeds. Not a treatment for depression: anyone with depression should see a doctor.
Why researchers looked
Lotus seed is used in traditional Asian medicine to calm the mind.
Traditional use
Used for hundreds of years in Asia for low mood, according to the trial authors. A tradition is not proof.
Proposed mechanism Preliminary mechanism
Brain-wave changes were reported in the higher-amount group; the meaning is unclear.
A proposed mechanism does not show that the effect happens in people.
No safety problem is described in the abstract, which calls its safety data preliminary.
Sleep quality (lotus plus Rhodiola extract)
Very low certaintyA small two-week study of a mix of Rhodiola and lotus extracts saw better sleep scores. The mix cannot show what lotus did, and the study had no comparison group in its abstract.
1 studiesA combination extract taken at bedtime; not lotus seed food.
Studies, doses and limits
What the trials found
A 2024 study of adults with mild sleep disturbance; 20 started and 13 finished.
Results
Improvements in two sleep questionnaires and a 57% fall in time awake after falling asleep.
Effect sizes as reported
ISI and PSQI scores improved; wake time after sleep onset fell 57%.
Why this rating
Tiny, 13 finishers, a mixed product, no placebo group described, and industry-linked authors.
Form and dose studied
A combination extract taken at bedtime; not lotus seed food.
Who was studied
Adults aged 20 to 65.
Limits
Cannot separate lotus from Rhodiola.
Why researchers looked
Lotus seed and embryo are used in traditional Asian medicine for restlessness.
Traditional use
Described only in general terms.
Proposed mechanism Preliminary mechanism
Not established.
A proposed mechanism does not show that the effect happens in people.
The abstract reports no significant side effects.
Diarrhoea (water extract in mice)
Not enough evidenceIn mice made to have diarrhoea, lotus seed extract reduced loose stools and improved gut-lining measures. No human data were found.
1 studiesWater extract in mice.
Studies, doses and limits
What the trials found
No human trial found.
Results
Fewer loose stools and a lower diarrhoea index in mice (p<0.05).
Effect sizes as reported
No human numbers.
Why this rating
Mouse study with a mixed extract set.
Form and dose studied
Water extract in mice.
Who was studied
Mice.
Limits
Not shown in people.
Why researchers looked
Lotus seed is used in traditional Chinese medicine for loose stools.
Traditional use
Described as a medicine-and-food use.
Proposed mechanism Preliminary mechanism
The authors report effects on gut bacteria, gut lining and water balance in mice.
A proposed mechanism does not show that the effect happens in people.
None specific.
Cancer, liver, anti-ageing, infection and other claims
Not enough evidenceA 2021 review lists many reported effects of lotus seed compounds. These come mainly from cells and animals. They are not shown benefits in people.
1 studiesExtracts and isolated compounds.
Studies, doses and limits
What the trials found
The review abstract does not report human trials.
Results
Many reported effects, none shown in people.
Why this rating
Lab and animal work.
Form and dose studied
Extracts and isolated compounds.
Who was studied
Cells and animals.
Limits
Review abstract only.
Why researchers looked
Reviews gather lab findings on the many compounds in the seed.
Traditional use
General.
Proposed mechanism Preliminary mechanism
Antioxidant and other lab effects are described.
A proposed mechanism does not show that the effect happens in people.
None specific.
Connections to the rest of health
How Lotus Seeds 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
A. Wellness goals
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Blood Sugar Balance | Potential benefit | Very low certainty | Blood sugar response after a meal (cooked lotus seed): In a small crossover trial, ten healthy adults ate pre-soaked, cooked lotus seed. Their blood sugar rose slowly, giving a low glycemic index. This was a single meal test, not a long-term trial. | 6 |
| Heart Health | Not enough evidence | Blood pressure (lotus seed extract in rats): In rats with drug-induced high blood pressure, a lotus seed extract lowered blood pressure. No trial has tested eating lotus seeds for blood pressure in people. | 8 | |
| Stress Relaxation | Potential benefit | Very low certainty | Low mood and stress (water extract of lotus seed): In a two-week trial of 45 adults with depression, a standardised water extract of lotus seed gave better scores than placebo at the lower of two amounts. This was an extract, not the food, and the trial was small and short. | 4 |
| Better Sleep | Potential benefit | Very low certainty | Sleep quality (lotus plus Rhodiola extract): A small two-week study of a mix of Rhodiola and lotus extracts saw better sleep scores. The mix cannot show what lotus did, and the study had no comparison group in its abstract. | 7 |
| Gut Digestive Health | Not enough evidence | Diarrhoea (water extract in mice): In mice made to have diarrhoea, lotus seed extract reduced loose stools and improved gut-lining measures. No human data were found. | 3 |
B. Body systems
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Endocrine System | Biological association | Very low certainty | Studied for: Blood sugar response after a meal (cooked lotus seed) | 6 |
| Cardiovascular System | Biological association | Not enough evidence | Studied for: Blood pressure (lotus seed extract in rats) | 8 |
| Nervous System | Biological association | Very low certainty | Studied for: Low mood and stress (water extract of lotus seed) Studied for: Sleep quality (lotus plus Rhodiola extract) | 4 7 |
| Digestive System | Biological association | Not enough evidence | Studied for: Diarrhoea (water extract in mice) | 3 |
E. Health conditions
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Chronic kidney disease | Adverse effect or risk | Documented risk | High potassium and phosphorus may matter for people on mineral limits. Preparation or compound: Dried lotus seed |
11 12 |
I. Biomarkers
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Glycemic index (one meal) | Biological association | Very low certainty | Measured in trials: low value in cooked lotus seed. A lab change is not the same as a health benefit. | 6 |
| Blood pressure in rats given an extract | Biological association | Not enough evidence | Measured in trials: lower. A lab change is not the same as a health benefit. | 8 |
| Depression and stress scores (extract, 2 weeks) | Biological association | Very low certainty | Measured in trials: lower with the lower extract amount. A lab change is not the same as a health benefit. | 4 |
| Sleep scores (combination extract) | Biological association | Very low certainty | Measured in trials: better. A lab change is not the same as a health benefit. | 7 |
L. Active compounds
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Alkaloids in the green embryo (for example neferine) | Biological association | Lab and animal | Studied in the lab; no human food data. Preparation or compound: Embryo |
2 |
| Starch | Biological association | Small human trial | Digests slowly in one small trial. Preparation or compound: Kernel |
6 12 |
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 26, 2026).
Evidence at a glance: what the research found for 6 outcomes
Each outcome below is one thing researchers measured. Certainty is how far the evidence can be trusted, not how well it works. The full studies are on the next tab.
The evidence
The research centre for Lotus Seeds. Every record here was checked against PubMed or the publisher's page; we never list a study we have not verified.
Evidence by outcome
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 started from our existing lotus seeds summary, read PubMed abstracts and the WHO, FDA and NIDDK pages, and checked the plant name in GBIF. Only abstracts were read for studies. Items we could not verify are flagged in the research gaps.
Study library: every study we checked 13
| Study | Design | People | Product, dose, length | Result |
|---|---|---|---|---|
| Food Research International 2026 Aflatoxins and their biosynthetic precursors in lotus seeds: simultaneous UPLC-MS/MS determination, contamination profiling, and matrix-specific accumulation during Aspergillus flavus infection Food Research International · Source |
Laboratory testing of 41 samples Natural lotus seed samples |
Methods, limits and fundingRead: abstract | ||
| Food Science & Nutrition 2021 Lotus seeds (Nelumbinis semen) as an emerging therapeutic seed: A comprehensive review Food Science & Nutrition · Source |
Narrative review Nelumbo nucifera seeds |
Methods, limits and fundingRead: abstract | ||
| Frontiers in Microbiology 2026 Modulation of gut microbiota and intestinal barrier by lotus seed, jujube, and longan aril in senna leaf-induced diarrhea mice Frontiers in Microbiology · Source |
Mouse study Water extracts of lotus seed, jujube and longan aril |
Methods, limits and fundingRead: abstract | ||
| International Journal of Environmental Research and Public Health 2022 A Randomized Double-Blind, Placebo-Controlled Study on Anti-Stress Effects of Nelumbinis Semen International Journal of Environmental Research and Public Health · Source |
Randomised placebo controlled trial, 45 adults with depressive disorders Standardised water extract of lotus seed (not the food) |
Methods, limits and fundingRead: abstract | ||
| Journal of Fungi (Basel) 2025 Occurrence and Diversity of Fungi and Their Mycotoxin Production in Common Edible and Medicinal Substances from China Journal of Fungi (Basel) · Source |
Laboratory survey of 163 commercial samples Commercial edible and medicinal substances, including Nelumbinis semen |
Methods, limits and fundingRead: abstract | ||
| Nutrients 2019 Acute Effects of Three Cooked Non-Cereal Starchy Foods on Postprandial Glycemic Responses and in Vitro Carbohydrate Digestion in Comparison with Whole Grains: A Randomized Trial Nutrients · Source |
Randomised crossover trial, 10 healthy adults Nelumbo nucifera seed, pre-soaked and cooked |
Methods, limits and fundingRead: abstract | ||
| Nutrients 2024 Mixture of Rhodiola rosea and Nelumbo nucifera Extracts Ameliorates Sleep Quality of Adults with Sleep Disturbance Nutrients · Source |
Small open study, 20 started and 13 finished Combination of Rhodiola rosea and lotus extracts |
Methods, limits and fundingRead: abstract | ||
| Pharmaceuticals (Basel) 2025 Antihypertensive Effects of Lotus Seed (Nelumbo nucifera Gaertn.) Extract via eNOS Upregulation and Oxidative Stress Reduction in L-NAME-Induced Hypertensive Rats Pharmaceuticals (Basel) · Source |
Animal study Rats given an extract |
Methods, limits and fundingRead: abstract | ||
| s-fda-mycotoxins FDA: Mycotoxins (natural toxins in food) · Source |
Official guidance n/a |
Methods, limits and fundingRead: full-text | ||
| s-gbif-nelumbo-nucifera GBIF Backbone: Nelumbo nucifera Gaertn. (usageKey 2882449) · Source |
Reference database n/a |
Methods, limits and fundingRead: full-text | ||
| s-niddk-ckd NIDDK: Eating and nutrition for chronic kidney disease · Source |
Official guidance n/a |
Methods, limits and fundingRead: full-text | ||
| s-usda-fdc-170149 USDA FoodData Central: Seeds, lotus seeds, dried (FDC 170149, SR Legacy) · Source |
Food composition database n/a |
Methods, limits and fundingRead: secondary | ||
| s-who-mycotoxins WHO fact sheet: Mycotoxins · Source |
Official guidance n/a |
Methods, limits and fundingRead: full-text |
What we do not know yet
- No trial of eating lotus seeds for blood pressure, cholesterol or long-term blood sugar was found.
- The glycemic trial used 10 healthy adults.
- Allergy, pregnancy, breastfeeding, choking risk for young children, heavy metals and oxalate were not researched.
- The USDA record could not be re-fetched on the day; nutrition values come from the existing page that cites it.
- The safety of the green embryo was not found.
How new research is added
New studies are found by a saved PubMed search and placed in a review queue before the page changes.
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 4
Glycemic index (one meal)
Low value in cooked lotus seed in trials
Results and what it means
Blood pressure in rats given an extract
Lower in trials
Results and what it means
Depression and stress scores (extract, 2 weeks)
Lower with the lower extract amount in trials
Results and what it means
Sleep scores (combination extract)
Better in trials
Results and what it means
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 3
- Mould and aflatoxin can occur in dried lotus seeds. A 2026 laboratory study found aflatoxins in 63.4% of 41 natural lotus seed samples, mostly the B group, and suggests drying promptly after harvest. A 2025 survey of 163 commercial edible and medicinal items found one Nelumbinis semen sample with aflatoxin B1 above European and Chinese limits. WHO and FDA call aflatoxins very poisonous and linked to liver cancer with regular exposure. WHO advises discarding nuts that look mouldy, discoloured or shrivelled. Seeds are not named in that advice, so treating dried lotus seeds the same way is our reading. Laboratory survey 1 5 13 9
- Kidney disease: lotus seeds contain a lot of potassium and phosphorus. USDA lists about 1,368 mg potassium and 626 mg phosphorus per 100 g of dried seeds. NIDDK says kidney disease can let both build up and that a health professional may advise limiting foods that contain them. People with kidney disease should ask their dietitian about lotus seeds. Authoritative guidance 11 12
- Not the same as makhana or blue lotus. Makhana (fox nut) comes from Euryale ferox, a different plant in a different family. Blue lotus sold as tea or vape is a water lily flower, not this seed. Results for one do not apply to the others. Reference database 10
Side effects 2
| Effect | How often | Severity and recovery | Evidence |
|---|---|---|---|
| Illness from mouldy seeds (aflatoxin) WHO says a large amount at once can be dangerous to the liver; regular exposure raises liver cancer risk. | Not established | mild to severe Varies | Authoritative guidance 13 9 |
| Allergy No source we read describes lotus seed allergy. Any food can cause one. Swelling of the face or throat or trouble breathing is an emergency. | Not established | unknown unknown | None found |
Liver
No liver injury from eating lotus seeds was found in the sources read. LiverTox was not checked. Aflatoxin from mouldy seeds is a separate liver concern. 13
How often. Not found.
This is a safety connection. It is not evidence that Lotus Seeds supports liver health.
Medicines and supplements 2
| With | Why it matters | Importance | Evidence | What to do |
|---|---|---|---|---|
| Blood pressure medicines prescription | A lotus seed extract lowered blood pressure in rats. | No human interaction was found for eating the seeds. Rat extract data do not show an effect from food. | Animal research Not enough evidence 8 | A pharmacist can check your own medicines. |
| Other prescription and over-the-counter medicines prescription | No source read describes a medicine interaction with eating lotus seeds. Extracts were not checked. | None found Not enough evidence | Ask a pharmacist, especially before taking lotus extracts. |
Who should check first 2
Overdose, product quality and regulators
Summary. The one toxicity concern in the sources read is mould toxin from poor storage. Lotus seed as a food has a long history of use but we found no formal safety assessment.
Animal. Not reviewed.
Human doses studied. The extract trial reports no safety problem in its abstract; the food was not studied for safety.
Overdose response. Not found.
Genotoxicity. Not reviewed.
Toxic or hazardous parts. Not researched. Sources describe alkaloids in the green embryo; no safety data were found.
Mould and aflatoxin are the documented concern. Heavy metals and pesticides were not researched.
Aflatoxins in 41 natural samples (2026). 63.4% contained aflatoxins, mostly B-group. 1
Mycotoxins in 163 commercial samples (2025). One Nelumbinis semen sample contained 10.75 micrograms per kg aflatoxin B1, over limits in Europe and China. 5
| Body | Action | Date |
|---|---|---|
| WHO (International) | Fact sheet on mycotoxins; advises discarding mouldy, discoloured or shrivelled nuts source | page read 2026-10-26 |
| FDA (United States) | Page on mycotoxins and aflatoxin risk source | page read 2026-10-26 |
| NIDDK (United States) | Eating and nutrition advice for chronic kidney disease source | page read 2026-10-26 |
When to get medical help
- Swelling of the lips, face, tongue or throat
- Trouble breathing or wheezing after eating
- Vomiting, yellow skin or eyes, or severe stomach pain after eating mouldy seeds
Stop using the product 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 are lotus seeds good for?
They are a protein- and mineral-rich seed cooked in Asian dishes. Research on health effects is very thin and mostly from extracts or animals.
Do lotus seeds lower blood sugar?
One small trial of 10 healthy adults found a low glycemic index for cooked lotus seed. It was one meal and not tested in people with diabetes.
Do lotus seeds lower blood pressure?
A lotus seed extract lowered blood pressure in rats. No human trial of eating the seeds was found.
Do lotus seeds help with sleep or low mood?
How many calories and how much protein are in lotus seeds?
USDA lists dried seeds at 332 kcal and 15.41 g protein per 100 g. A 28 g ounce has about 94 kcal and 4.4 g protein.
Are lotus seeds the same as makhana?
No. Makhana (fox nut) is the seed of a different plant, Euryale ferox, in the water lily family. Lotus seeds come from Nelumbo nucifera.
Is blue lotus the same as lotus seed?
No. Blue lotus tea is a water lily flower, a different plant.
Can lotus seeds be contaminated with mould?
Are lotus seeds safe with kidney disease?
Can you be allergic to lotus seeds?
We found no source describing lotus seed allergy. Any food can cause a reaction. Swelling of the face or throat or trouble breathing needs emergency help.
Are lotus seeds safe in pregnancy?
We did not find an official source on lotus seeds in pregnancy or breastfeeding. Ask a doctor or midwife.
Do lotus seeds interact with medicines?
No source read describes an interaction with eating the seeds. A lotus extract lowered blood pressure in rats, so a pharmacist can check your own medicines.
Explore by health goal
Blood Sugar BalanceHeart HealthStress RelaxationBetter SleepGut Digestive Health
Editorial transparency
- Written by
- AlternativeMed editorial team. Research compiled with AI assistance, then checked against the sources listed.
- Medical review
- None. This page has not been reviewed by a physician or pharmacist.
- First published
- 2026-10-26
- Last substantive update
- 2026-10-26
- How we research
- We started from our existing lotus seeds summary, read PubMed abstracts and the WHO, FDA and NIDDK pages, and checked the plant name in GBIF. Only abstracts were read for studies. Items we could not verify are flagged in the research gaps.
- 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.
Sources 13
Each source was opened and checked. Where we read only the abstract, it says so. The small numbers in the text point here.
- . Aflatoxins and their biosynthetic precursors in lotus seeds: simultaneous UPLC-MS/MS determination, contamination profiling, and matrix-specific accumulation during Aspergillus flavus infection. Food Research International. 2026. (abstract)
- . Lotus seeds (Nelumbinis semen) as an emerging therapeutic seed: A comprehensive review. Food Science & Nutrition. 2021. (abstract)
- . Modulation of gut microbiota and intestinal barrier by lotus seed, jujube, and longan aril in senna leaf-induced diarrhea mice. Frontiers in Microbiology. 2026. (abstract)
- . A Randomized Double-Blind, Placebo-Controlled Study on Anti-Stress Effects of Nelumbinis Semen. International Journal of Environmental Research and Public Health. 2022. (abstract)
- . Occurrence and Diversity of Fungi and Their Mycotoxin Production in Common Edible and Medicinal Substances from China. Journal of Fungi (Basel). 2025. (abstract)
- . Acute Effects of Three Cooked Non-Cereal Starchy Foods on Postprandial Glycemic Responses and in Vitro Carbohydrate Digestion in Comparison with Whole Grains: A Randomized Trial. Nutrients. 2019. (abstract)
- . Mixture of Rhodiola rosea and Nelumbo nucifera Extracts Ameliorates Sleep Quality of Adults with Sleep Disturbance. Nutrients. 2024. (abstract)
- . Antihypertensive Effects of Lotus Seed (Nelumbo nucifera Gaertn.) Extract via eNOS Upregulation and Oxidative Stress Reduction in L-NAME-Induced Hypertensive Rats. Pharmaceuticals (Basel). 2025. (abstract)
- . FDA: Mycotoxins (natural toxins in food). . . (full-text)
- . GBIF Backbone: Nelumbo nucifera Gaertn. (usageKey 2882449). . . (full-text)
- . NIDDK: Eating and nutrition for chronic kidney disease. . . (full-text)
- . USDA FoodData Central: Seeds, lotus seeds, dried (FDC 170149, SR Legacy). . . (secondary)
- . WHO fact sheet: Mycotoxins. . . (full-text)
Where to buy
Check the label first. Whatever you buy, look for these:
- Raw or roasted, and salted or unsalted
- A best-by date, since nuts and seeds turn rancid
- Tree nut and peanut allergy warnings
- A resealable bag, and cool storage once opened
Talk to a pharmacist or doctor before you start any supplement, especially if you take medicines. See the Safety tab for interactions.
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