Fenugreek
Fenugreek (Trigonella foenum-graecum): pregnancy warning, legume allergy, blood sugar medicine cautions, mixed evidence for diabetes and milk supply, and the maple-syrup body odor.
Content last updated . This page has not been medically reviewed.
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What is Fenugreek good for?
What the body uses it for, and how strong the evidence is. A normal job in the body is not proof that extra supplements add benefit; each card says which.
Blood sugar (type 2 diabetes and prediabetes)
Preliminary or mixedA 2023 review of 10 small trials (706 people) found lower fasting glucose and HbA1c with fenugreek, but NCCIH says many studies were of low quality.
Supplements: Promising but limited; changes in lab numbers, not proven health outcomes. Not a replacement for diabetes treatment.
Cholesterol and blood fats
Preliminary or mixedIn the same 2023 review, total cholesterol, triglycerides and HDL improved, while LDL cholesterol did not change significantly.
Supplements: Small trials of varying quality; results do not show fewer heart events.
Breast milk supply
Preliminary or mixedNCCIH says studies on milk production have mixed results, so it is unclear whether fenugreek helps. EMA advises against fenugreek seed medicines while breastfeeding.
Supplements: Mixed human evidence; safety in larger-than-food amounts while nursing is not well known.
Menstrual cramps
Not enough evidenceNCCIH says only a few small, low-quality studies exist, so the effect is uncertain.
Supplements: Insufficient evidence.
Loss of appetite and minor skin inflammation (traditional use)
Preliminary or mixedThe EU herbal committee accepts fenugreek seed for temporary loss of appetite and, on the skin, minor inflammation, on the basis of long-standing use, not clinical trials.
Supplements: Traditional use only; not shown by trials.
Connected topics
Open a group to see how each topic connects and how strong the evidence is.
Health goals (3)
- Blood Sugar BalancePreliminary or mixed
A 2023 review of small trials found lower fasting glucose and HbA1c in people with type 2 diabetes or prediabetes, but NCCIH says many studies were low quality.
- Cholesterol BalancePreliminary or mixed
One meta-analysis found lower total cholesterol and triglycerides but no significant LDL change; trials were small.
- Metabolic HealthPreliminary or mixed
Small trials report modest changes in blood sugar and blood fats in people with diabetes or prediabetes; evidence is limited.
Body systems (7)
- Blood Sugar SupportPreliminary or mixed
Small trials suggest lower blood sugar markers in type 2 diabetes; quality is mixed.
- Immune SupportDocumented risk
Fenugreek can cause allergic reactions, sometimes serious, especially in people allergic to peanut, soya or other legumes.
- Immune SystemDocumented risk
Allergic reactions, including facial swelling, wheezing and asthma, have been reported.
- Reproductive HealthDocumented risk
Not safe above food amounts in pregnancy; evidence on milk supply is mixed.
- Digestive SystemDocumented risk
Diarrhea, nausea and gas are the most reported side effects; EU use for loss of appetite is traditional only.
- Endocrine SystemPreliminary or mixed
Fenugreek may lower blood sugar, so it can add to the effect of diabetes medicines.
- Metabolism & WeightPreliminary or mixed
Blood sugar and blood-fat markers changed modestly in small trials; no weight effect was shown (BMI unchanged).
Body parts (4)
- Reproductive OrgansDocumented risk
Not safe above food amounts in pregnancy because of links to birth defects.
- PancreasPreliminary or mixed
Blood sugar markers fell in small trials; the pancreas is the organ behind the insulin and glucose control measured, but trials did not test the organ directly.
- SkinPreliminary or mixed
EU committee accepts fenugreek seed on the skin for minor inflammation on traditional use only.
- StomachDocumented risk
Digestive upset such as nausea and diarrhea is reported.
Functional actions (3)
- Blood Sugar RegulationPreliminary or mixed
Small trials found lower fasting glucose and HbA1c; many studies were low quality.
- Digestive SupportPreliminary or mixed
Accepted in the EU for temporary loss of appetite on traditional use only.
- Metabolic OptimizationPreliminary or mixed
Modest changes in blood sugar and blood fats in small trials; evidence limited.
Root causes (2)
- Blood Sugar ImbalancePreliminary or mixed
Studied in people with type 2 diabetes and prediabetes, with lower glucose markers in small trials; not a replacement for treatment.
- Medication Side EffectsDocumented risk
Its blood-sugar-lowering effect can add to diabetes medicines, so glucose should be monitored.
Biomarkers (3)
- Blood GlucosePreliminary or mixed
Fasting and post-meal glucose were lower in a 2023 meta-analysis of 10 trials; study quality varied.
- HbA1cPreliminary or mixed
HbA1c was lower in a 2023 meta-analysis of 10 trials; study quality varied.
- TriglyceridesPreliminary or mixed
Triglycerides improved in the same meta-analysis; small trials.
Conditions & symptoms (3)
- Diabetes MellitusPreliminary or mixed
Small trials suggest lower blood sugar markers, but many were low quality. Fenugreek does not replace diabetes treatment.
- Food AllergyDocumented risk
Fenugreek can cause allergic reactions, sometimes serious; people allergic to peanut, soya or other legumes should avoid fenugreek seed medicines.
- HypoglycemiaDocumented risk
Large amounts may cause a harmful drop in blood sugar, especially with diabetes medicines.
Documented risks and interactions (5)
- Pregnancy: not safe above food amounts. NCCIH says use above food amounts has been linked to birth defects in animals and people. EMA says not to use fenugreek seed medicines in pregnancy.
- Allergy, including to peanut, soya and other legumes. Fenugreek can cause allergic reactions, sometimes serious. EMA says not to use it if allergic to fenugreek, peanut, soya or other legume-family plants.
- Low blood sugar with diabetes medicines. Large amounts may cause a harmful drop in blood sugar (NCCIH). EMA says blood glucose should be monitored closely in people with diabetes who take it.
- Digestive side effects. Diarrhea, nausea, gas and other digestive symptoms can occur; EMA notes very large amounts of seed powder have caused minor digestive symptoms.
- Children and breastfeeding cautions. EMA says fenugreek seed medicines are not for under-18s or during breastfeeding; NCCIH says there is too little information on larger-than-food amounts in children.
Fenugreek is not safe in pregnancy in amounts above food amounts. NCCIH (US) says its use has been linked to increased risks of birth defects in both animals and people. [1] It can also cause allergic reactions, including serious ones, and large amounts may cause a harmful drop in blood sugar. [1] EMA (EU) says fenugreek seed medicines should not be used by people allergic to peanut, soya or other legume-family plants. [2] If you have trouble breathing, swelling of the face or other signs of a severe allergic reaction, call 911.
What fenugreek is
Fenugreek is a clover-like herb native to the Mediterranean region, southern Europe and western Asia. [1] The scientific name is Trigonella foenum-graecum L., family Fabaceae (the legume family). [3] The seed is the part used; its seeds smell and taste like maple syrup, and it is used as a spice and traditional medicine. [1]Traditional use
This is tradition, not proof. NCCIH says fenugreek has been used as a medicinal plant for about 6,000 years in various cultures, as a tonic or laxative and for menstrual cramps, menopause symptoms, kidney stones, and to stimulate milk production during breastfeeding. [1] The sources do not name particular peoples or regions, so we do not. EMA's committee (EU, assessment summary published 2026) recognizes fenugreek seed for traditional use only, for temporary loss of appetite and, on the skin, minor skin inflammation, meaning long-standing use rather than clinical trial results. [2]What research shows
NCCIH says there is not enough high-quality evidence to determine whether fenugreek is useful for diabetes or menstrual cramps. [1]| Use | What the source found | Strength of evidence | Population and form studied |
|---|---|---|---|
| Type 2 diabetes and prediabetes | NCCIH: it may help lower blood sugar, but many studies were not of high quality. [1] A 2023 meta-analysis of 10 randomized trials (706 people) found lower fasting glucose and HbA1c, but no significant change in insulin resistance (HOMA-IR). [4] | Promising but limited; biomarker change, not a clinical outcome | Adults with type 2 diabetes or prediabetes; form not stated in the abstract we read |
| Menstrual cramps | Few studies, low quality, effects uncertain. [1] | Insufficient evidence | Women with cramps |
| Breast milk supply | NCCIH: uncertain; studies mixed. [1] LactMed: one meta-analysis found a mild effect with unknown safety, another found no good evidence; some studies used multi-ingredient products. [5] | Mixed | Breastfeeding mothers; often blends |
| Loss of appetite; minor skin inflammation | Accepted in the EU on traditional use only. [2] | Traditional use only | Seed preparations |
Results for seed powder, extract, tea or a blend do not transfer to one another. Fenugreek in cooking is a different amount from a supplement; NCCIH says fenugreek is believed safe for adults and children in food amounts. [1]
Frequently asked questions
Does fenugreek lower blood sugar?
A 2023 meta-analysis found lower fasting glucose and HbA1c, but NCCIH says many studies were not high quality. [4][1] It is not a replacement for diabetes treatment.
Does fenugreek increase breast milk?
Mixed. NCCIH says studies had mixed results. [1] LactMed reports one meta-analysis with a mild effect and another with no good evidence. [5] EMA advises against fenugreek seed medicines during breastfeeding. [2]
Why do I smell like maple syrup?
LactMed describes a maple syrup odor of urine, sweat and feces after fenugreek. [5] A scoping review also lists the odor in infants and mothers. [6] Ask a clinician if you are unsure what is causing an unusual smell.
Can I take fenugreek if I am allergic to peanuts?
EMA says not to use fenugreek seed if allergic to peanut, soya or other legumes. [2]
Is fenugreek safe in pregnancy?
NCCIH says not in amounts above food amounts, linking it to birth defects. [1]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Safety
- Pregnancy: not safe above food amounts (see top). [1] EMA's advice is not to use fenugreek seed medicines in pregnancy. [2] See Pregnancy and Breastfeeding.
- Breastfeeding: EMA's advice is not to use fenugreek seed medicines while breastfeeding. [2] NCCIH and LactMed both say little is known about safety in larger amounts or in infants. [1][5] LactMed notes it can impart a maple syrup odor to urine, sweat, feces and possibly breast milk. [5]
- Children: EMA advises against use under 18. [2] NCCIH says there is not enough information on amounts larger than food amounts. [1]
- Allergy: can cause serious allergic reactions. [1] EMA lists allergy to fenugreek, peanut, soya and other legumes; LactMed says cross-reaction with chickpeas, peanuts and other legumes is possible and reports asthma worsening and a drop in blood potassium. [2][5]
- Medicines: EMA says that because of a possible blood-sugar-lowering effect, blood glucose should be monitored closely in people treated for diabetes, and that no other interactions had been described in the literature at the time. [2] LactMed says fenugreek can interact with warfarin to cause bleeding and advises caution in people with diabetes or taking warfarin. [5] Read Supplements and Diabetes Medicines, Supplements and Blood Thinners and How Interactions Work. Never stop or change a prescribed medicine without the prescriber or pharmacist.
- Side effects: diarrhea, nausea and other digestive symptoms. [1] A scoping review of 60 articles found mild stomach upset most common; it also lists low blood sugar, possible low potassium, allergic reactions and maple-syrup odor. It reports no deaths attributed to fenugreek. [6] EMA says very large amounts of seed powder (more than 25 g per day) have been reported to cause minor digestive symptoms. [2]
- Liver: LactMed says liver toxicity has been reported, alone and in herbal combinations containing fenugreek. [5] The 2023 meta-analysis of trials observed no liver or kidney toxicity. [4] Both findings are reported; report symptoms such as yellow skin or eyes to a clinician. See Liver Injury Warning Signs.
- Surgery, kidney, older adults: not clearly described in the sources we read, except the warfarin and blood-sugar points above. Tell the surgical team about any supplement.
We give no amounts for people. A clinician or pharmacist decides what suits a person. For other herbs studied for blood sugar, see Herbs for Blood Sugar and Diabetes.
References
- NCCIH (US), Fenugreek, last updated February 2025. Read 2026-10-23.
- EMA (EU), Committee on Herbal Medicinal Products, Fenugreek seed: summary of conclusions, assessment report summary published March 2026. Read 2026-10-23.
- GBIF Backbone Taxonomy, Trigonella foenum-graecum match record. Read 2026-10-23.
- Kim J et al. The effect of fenugreek in type 2 diabetes and prediabetes: a systematic review and meta-analysis of randomized controlled trials. International Journal of Molecular Sciences, 2023. Read 2026-10-23.
- LactMed, NIH (US), Fenugreek, record updated 2026. Read 2026-10-23.
- Amiri Ardekani E et al. Exploring the adverse effects of fenugreek in humans: a scoping review. Iranian Journal of Medical Sciences, 2026. Read 2026-10-23.