Diabec bottle next to a circle photo of fenugreek (methi) seeds spilling from a brass mortar

Fenugreek: Benefits, Evidence, Dose and Safety

NOVEMBER 12, 2026 | BY MARIE ALLEN

Key Takeaways

  • Fenugreek (Trigonella foenum-graecum), also called methi, is a herb whose seeds are used as a spice and a traditional remedy, including for diabetes.[1][2]
  • Pooled reviews of small trials report changes in blood sugar values against control groups, but most trials were of low quality and the results vary a lot. The US NCCIH says there is not enough high-quality evidence to know if fenugreek is useful for diabetes.[3][4][1]
  • A Diabec serving contains 100 mg of fenugreek. The trials we found used 1 g to 10 g a day, so 10 to 100 times more, and no clinical trial has tested Diabec as a finished blend.[5][6][7][8]
  • Fenugreek is not safe in pregnancy above food amounts. It may interact with warfarin and add to the effect of diabetes medicines, and people with a peanut or chickpea allergy may react to it.[1][2][9][10]

Fenugreek is a kitchen spice with a long history as a folk remedy for diabetes. Several pooled reviews of fenugreek benefits in human trials exist, but most trials are small, short and of low quality. They also used very different doses.[3][11][1] The US National Center for Complementary and Integrative Health (NCCIH) says research on herbal supplements for diabetes, fenugreek included, has been limited in the number, size and quality of studies.[12]

We make Diabec, which contains fenugreek, so we have a stake in this topic. Below we set out what the studies found, what dose they used, how that compares with a Diabec serving, and who should be careful.

This guide is general education. If you use insulin or other glucose medicines, follow the plan your diabetes team gave you.

What is fenugreek?

Fenugreek is a clover-like herb from the Mediterranean region, southern Europe and western Asia.[1] It belongs to the legume family, the same plant family as peas and peanuts.[13] Its seeds smell and taste like maple syrup, and they are used in Middle Eastern, African and Indian cooking and in Ayurveda.[1][2] People have used it as a medicinal plant for about 6,000 years.[1]

Memorial Sloan Kettering Cancer Center (MSKCC) says the fibre in the seeds, called galactomannan, and plant compounds called saponins may reduce how much glucose the gut absorbs. Most of this comes from lab and animal work.[2] Results in cells or animals do not tell you what will happen in people, which is why this article sticks to human trials.[12]

What other names does fenugreek go by?

In India and much of South Asia, people call fenugreek methi. MSKCC also lists Greek hayseed, bird's foot, Bockshornsame and hu lu ba as common names.[2] The scientific name is Trigonella foenum-graecum.[1] All of these names refer to the same plant, but supplements made from it can differ a lot. Some trials used whole seed powder and others used a seed extract, so the amounts are hard to compare.[3][6][7]

What does the research say about fenugreek for blood sugar?

In short, the evidence is mixed and mostly of low quality. A 2014 review pooled 10 trials. It reported fasting blood sugar 0.96 mmol/L (about 17 mg/dL) below the control groups.[3] The same review found that most trials were of low quality, and that clear effects showed up only with medium or high doses in people with diabetes.[3] A 2023 review of 14 trials found no significant difference in fasting blood sugar.[4] None of these trials tested Diabec.[8]

When we searched PubMed for this article in November 2026, we found several pooled reviews and a number of small trials. Here is what the main ones reported.[3][14][11][4][15] When we set our own label next to these trials, our 100 mg serving was one tenth of the smallest daily dose we found.[5][6]

  • A 2014 review of 10 trials reported fasting blood sugar 0.96 mmol/L below control. Two hours after a glucose drink, it was 2.19 mmol/L (about 39 mg/dL) below control. HbA1c was 0.85 points below control. That last result came from only 3 trials.[3]
  • A 2016 review of 12 studies in people with diabetes or prediabetes reported fasting blood sugar 0.84 mmol/L (about 15 mg/dL) below control. It noted that some studies were of low quality.[14]
  • A 2023 review of 10 trials with 706 people with type 2 diabetes or prediabetes reported fasting glucose and HbA1c below control with fenugreek. It found no clear change in a measure of insulin resistance called HOMA-IR.[11]
  • Another 2023 review of 14 trials with 894 people found no significant difference in fasting or after-meal blood sugar. It did report HbA1c 0.88 points below control, and said the quality and mixed results of the studies remain a concern.[4]
  • A 2025 update pooled 26 trials and reported fasting blood sugar 16.75 mg/dL (about 0.93 mmol/L) below control. Its authors called for studies of higher quality to confirm the results.[15]

Single trials show how different the products were.

  • In an Indian trial, 25 people newly diagnosed with type 2 diabetes took 1 g a day of a fenugreek seed extract or a placebo for two months. Fasting and 2-hour blood sugar did not differ between the groups, but the overall glucose curve during a glucose test was smaller with fenugreek.[6]
  • In an Iranian trial, 88 people with type 2 diabetes took 10 g a day of fenugreek seed powder or a starch placebo for 8 weeks. Fasting blood sugar and HbA1c changed significantly more with fenugreek, but the abstract gives p-values and not the size of the change.[7]
  • In a 12-week Saudi trial, 12 people on metformin took 2 g a day of fenugreek or the diabetes drug glibenclamide. Only 9 finished, and the change in fasting blood sugar with fenugreek was not significant.[16]

For how fenugreek compares with other popular supplements, read glucose support supplements: what the evidence says. Our articles on gymnema sylvestre benefits and bitter melon benefits look at two other herbs in Diabec in the same way.

What about prediabetes?

Prediabetes means blood sugar is above normal but below the range used to diagnose diabetes.[17] Two trials in adults with prediabetes point in opposite directions.[18][17]

  • In a 3-year Indian study, 140 adults with prediabetes took 5 g of fenugreek powder twice a day before meals, or were matched controls. The authors reported larger drops in fasting and after-meal blood sugar in the fenugreek group. The abstract does not describe blinding or say whether the control group took a placebo.[18]
  • In a 6-month Greek trial, 100 adults with prediabetes took a product that combined fenugreek, olive leaf extract and bergamot, or a placebo. HbA1c, fasting glucose and insulin did not change in either group.[17]

The Indian study used 10 g a day, which is 100 times the fenugreek in a Diabec serving.[18][5] It does not show that fenugreek, or Diabec, stops prediabetes from turning into diabetes. In our view, a single study like this needs a blinded repeat before anyone can rely on it. A 2017 review of plant foods for prediabetes reported a possible effect of fenugreek, but rated the studies as low quality.[19]

How good is the fenugreek evidence, really?

Still not strong. The trials were small, many were short, and doses ranged from 1 g of extract to 10 g or more of seed powder a day.[3][6][7][18] Reviews that looked at the same body of work reached different answers on fasting blood sugar.[3][4] The 2014 review found clear effects only at medium or high doses.[3]

Small studies like these cannot tell you what fenugreek will do for you. The NCCIH says it does not have reliable evidence that any herbal supplements can help to control diabetes or its complications.[12] So the effects reported so far are signals from small and mixed studies, not firm results.[1][4]

How much fenugreek is in Diabec?

Diabec is a food supplement, not a medicine. One serving is two capsules and contains 100 mg of fenugreek, alongside bitter melon 400 mg, Enicostemma littorale 200 mg, gymnema 100 mg, neem leaf 100 mg and jamun 100 mg. The capsule is a vegan HPMC (hydroxypropyl methylcellulose) shell, and the other ingredient is rice flour.[5]

Source Daily amount of fenugreek Comparison group
One Diabec serving (2 capsules) 100 mg (about 0.0035 oz)[5] The blend has never been tested in a trial[8]
Indian trial, 2 months 1 g of seed extract[6] Placebo[6]
Saudi trial, 12 weeks 2 g[16] Glibenclamide, no placebo[16]
Iranian trial, 8 weeks 10 g of seed powder[7] Starch placebo[7]
Indian prediabetes study, 3 years 10 g of powder[18] Matched controls[18]

The trials used 10 to 100 times the 100 mg in a Diabec serving, and the 2014 review found clear effects only at medium or high doses. So none of these results apply to Diabec.[5][6][7][3] Our guide to Diabec ingredients covers the other five herbs, and our comparison of Diabec with gymnema or bitter melon alone looks at single-herb products.

PRO TIP

If you already take a fenugreek or methi supplement, or a breastfeeding tea that lists fenugreek, do not add Diabec on top without asking your doctor or pharmacist. Diabec also contains fenugreek, so you could end up taking more of the same plant than you meant to.[5][2]

Is fenugreek safe, and what can it interact with?

The NCCIH says experts believe fenugreek is safe in the amounts found in food, and possibly safe for adults in larger amounts.[1] The most common side effect is mild stomach upset, such as diarrhoea or nausea.[1][14][20] A 2026 review of 60 reports found most side effects were mild and short-lived, and it reported no deaths linked to fenugreek.[20] There are still some real cautions.

  • Large doses may cause a harmful drop in blood sugar, the NCCIH says. A review for pharmacists lists fenugreek among natural health products that can add to diabetes medicines and cause low blood sugar.[1][9]
  • If you use insulin or a sulfonylurea such as gliclazide or glimepiride, the risk of low blood sugar matters most, so talk to your diabetes team before you start.[9][21][22] The NHS says low blood sugar is usually below 4 mmol/L (72 mg/dL).[21]
  • MSKCC advises against fenugreek if you take warfarin, because case reports suggest it may raise bleeding risk. In one case, a woman's INR, a blood clotting test, rose while she took fenugreek with another herb, and settled when she stopped.[2][23]
  • MSKCC also advises against supplemental fenugreek with SSRI antidepressants, after one case of serotonin syndrome. It advises people with a hormone-sensitive cancer to ask their doctor first.[2]
  • The NCCIH says fenugreek is not safe in pregnancy in amounts above those in food, because it has been linked to birth defects in animals and people.[1] Animal studies also suggest effects on fertility and pregnancy loss.[10]
  • Fenugreek can cause allergic reactions, including serious ones.[1][24] Studies report cross-reactions with peanut, and two patients in an Indian report reacted to both fenugreek and chickpea.[25][26][24]
  • Fenugreek can make urine, sweat or skin smell like maple syrup. When mothers took it during labour, their newborns had the same smell, which led doctors to suspect a rare metabolic disease.[20][27]

Who should be careful with Diabec?

Diabec is not recommended in pregnancy, for children, or for people with G6PD deficiency, and you should ask your doctor before using it while breastfeeding. If you have a peanut or chickpea allergy, check with your doctor first.[5][8]

If you use insulin or a sulfonylurea such as gliclazide or glimepiride, talk to your diabetes team before taking any herbal supplement. Bitter melon, gymnema and fenugreek can interact with diabetes medicines and increase the risk of low blood sugar.[8][9][21][22] Low blood sugar usually means below 4 mmol/L (72 mg/dL) in the UK or below 70 mg/dL (3.9 mmol/L) in the US.[21][22]

In the UK, the NHS says to call 999 if someone may have very low blood sugar and is not responding normally or is unconscious. Call 999 if glucagon is not available or you do not know how to use it. Also call if they have not recovered 10 minutes after glucagon, or if they have been drinking alcohol.[21]

In the US, the ADA says to call 911 right away if someone is unconscious and glucagon is not available or no one knows how to use it.[22]

Our full Diabec safety guide covers each herb, allergies and surgery in more detail.

How to discuss supplements safely with your doctor

Plan a short conversation rather than a quick question at the end of an appointment. These steps can help.

  1. Write down every prescription medicine, over-the-counter tablet and supplement you take, including the doses and any methi tea or breastfeeding tea.[9][1]
  2. Ask your doctor or pharmacist to check for interactions between fenugreek or any herbal blend and your diabetes medicines, warfarin or antidepressants.[8][2]
  3. Never stop, reduce or replace a prescribed diabetes medicine on your own.[21]
  4. Ask whether you need to check your blood glucose more often during the first few weeks.[9][21][22]
  5. Keep fast-acting carbohydrate nearby if you use insulin or a sulfonylurea such as gliclazide or glimepiride.[21][22]

Questions to ask your diabetes team

  • Could fenugreek add to the effect of my current diabetes medicines?[9][1]
  • Am I at risk of low blood sugar if I start a product that contains fenugreek?[9][21]
  • Should I check my glucose more often for the first few weeks, and at what times?[21][22]
  • Is there any reason, such as pregnancy plans, warfarin, a peanut allergy or a G6PD test result, that rules fenugreek or Diabec out for me?[2][10][5][8]

The bottom line on fenugreek

Fenugreek is a common spice whose reported benefits several pooled reviews have studied, but the trials are small and mostly of low quality.[3][4] They also used much larger doses than a Diabec serving.[5][6] If you want to try it, check your medicines with your diabetes team first.[9][21]

Frequently asked questions

What is fenugreek used for?

Fenugreek seeds are used as a spice and a flavouring, and in traditional medicine such as Ayurveda, including for diabetes. Fenugreek is also used to try to increase milk supply while breastfeeding.[1][2]

Is methi the same as fenugreek?

Yes. Methi is a common name for fenugreek, whose scientific name is Trigonella foenum-graecum. Other names include Greek hayseed and bird's foot.[2][1]

What does research say about fenugreek for blood sugar?

The evidence is mixed. Some pooled reviews of small trials report fasting blood sugar and HbA1c below control, while a 2023 review found no significant difference in fasting blood sugar. Most trials were of low quality, and the NCCIH says there is not enough high-quality evidence.[3][4][1]

How much fenugreek is in Diabec?

One Diabec serving of two capsules contains 100 mg of fenugreek. The trials we found used 1 g to 10 g a day, and Diabec itself has never been tested in a trial.[5][6][7][8]

Is fenugreek safe in pregnancy?

Not in amounts above those in food. The NCCIH says fenugreek is not safe in pregnancy in amounts above those in food, because it has been linked to birth defects. Diabec is not recommended in pregnancy, and you should ask your doctor before using it while breastfeeding.[1][8]

Can I take fenugreek with metformin, insulin or warfarin?

Ask your doctor first. Fenugreek may add to the effect of diabetes medicines and raise the risk of low blood sugar, and MSKCC advises against it if you take warfarin.[9][21][2]

Why does fenugreek make sweat smell like maple syrup?

Fenugreek seeds share a scent compound with maple syrup, and people who take fenugreek can have urine, sweat or skin with a maple syrup smell. It can confuse tests for a rare disease in newborns.[27][20]

Where to go next

For more on what is in Diabec, how it compares and how to use it safely, see:

Note: If you are pregnant, breastfeeding, or considering giving any supplement or herbal product to a child, consult your healthcare provider before making any changes to your diet, supplement routine, or prescribed medications.

Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Talk to your doctor before changing your diet, your activity or your medicines, and before starting any supplement.

Sources & References

  1. National Center for Complementary and Integrative Health (NCCIH). Fenugreek. Last updated February 2025. Checked 12 November 2026. nccih.nih.gov. Funding: not applicable, this is official US government guidance, not a funded study.
  2. Memorial Sloan Kettering Cancer Center. Fenugreek (About Herbs). Last updated 23 May 2025. Checked 12 November 2026. mskcc.org. Funding: not applicable, hospital patient information, not a funded study.
  3. Neelakantan N, Narayanan M, de Souza RJ, van Dam RM. Effect of fenugreek (Trigonella foenum-graecum L.) intake on glycemia: a meta-analysis of clinical trials. Nutr J. 2014. pubmed.ncbi.nlm.nih.gov/24438170. Funding: non-US government support noted on the PubMed record, funder not named. COI: no statement on the PubMed record.
  4. Shabil M, Bushi G, Bodige PK, Maradi PS, Patra BP, et al. Effect of Fenugreek on Hyperglycemia: A Systematic Review and Meta-Analysis. Medicina (Kaunas). 2023. pubmed.ncbi.nlm.nih.gov/36837450. Funding: none listed on the PubMed record. COI: the authors declared no conflict of interest.
  5. Diabec. Product page, label and supplement facts panel. Checked 12 November 2026. dia-bec.com. Funding: not applicable, seller product page. COI: published by the maker of Diabec.
  6. Gupta A, Gupta R, Lal B. Effect of Trigonella foenum-graecum (fenugreek) seeds on glycaemic control and insulin resistance in type 2 diabetes mellitus: a double blind placebo controlled study. J Assoc Physicians India. 2001. pubmed.ncbi.nlm.nih.gov/11868855. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  7. Rafraf M, Malekiyan M, Asghari-Jafarabadi M, Aliasgarzadeh A. Effect of Fenugreek Seeds on Serum Metabolic Factors and Adiponectin Levels in Type 2 Diabetic Patients. Int J Vitam Nutr Res. 2014. pubmed.ncbi.nlm.nih.gov/26098483. Funding: non-US government support noted on the PubMed record, funder not named. COI: no statement on the PubMed record.
  8. Diabec. Diabec side effects and safety. Checked 12 November 2026. dia-bec.com. Funding: not applicable, seller safety guide. COI: written by the maker of Diabec.
  9. Necyk C, Zubach-Cassano L. Natural Health Products and Diabetes: A Practical Review. Canadian Journal of Diabetes. 2017. pubmed.ncbi.nlm.nih.gov/28826695. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  10. Ouzir M, El Bairi K, Amzazi S. Toxicological properties of fenugreek (Trigonella foenum graecum). Food Chem Toxicol. 2016. pubmed.ncbi.nlm.nih.gov/27498339. Review of human and animal reports. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  11. Kim J, Noh W, Kim A, Choi Y, Kim YS. The Effect of Fenugreek in Type 2 Diabetes and Prediabetes: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Int J Mol Sci. 2023. pubmed.ncbi.nlm.nih.gov/37762302. Funding: Woosuk University, listed on the PubMed record. COI: the authors declared no conflict of interest.
  12. National Center for Complementary and Integrative Health (NCCIH). Diabetes and Dietary Supplements: What You Need To Know. Last updated November 2023. Checked 12 November 2026. nccih.nih.gov. Funding: not applicable, this is official US government guidance, not a funded study.
  13. Joseph NI, Slavin E, Peppers BP, Hostoffer RW. Fenugreek Anaphylaxis in a Pediatric Patient. Allergy Rhinol (Providence). 2018. pubmed.ncbi.nlm.nih.gov/29977649. Case report, cited for the plant family. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  14. Gong J, Fang K, Dong H, Wang D, Hu M, et al. Effect of fenugreek on hyperglycaemia and hyperlipidemia in diabetes and prediabetes: A meta-analysis. J Ethnopharmacol. 2016. pubmed.ncbi.nlm.nih.gov/27496582. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  15. Chehregosha F, Fakhr L, Tarighat-Esfanjani A, Maghsoumi-Norouzabad L. The effects of fenugreek (Trigonella foenum-graecum) seed on glycemic parameters: An updated systematic review and meta-analysis of randomized controlled trials. Avicenna J Phytomed. 2025. pubmed.ncbi.nlm.nih.gov/41509111. Funding: none listed on the PubMed record. COI: the authors declared no competing interests.
  16. Najdi RA, Hagras MM, Kamel FO, Magadmi RM. A randomized controlled clinical trial evaluating the effect of Trigonella foenum-graecum (fenugreek) versus glibenclamide in patients with diabetes. Afr Health Sci. 2019. pubmed.ncbi.nlm.nih.gov/31148988. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  17. Florentin M, Liberopoulos E, Elisaf MS, Tsimihodimos V. No effect of fenugreek, bergamot and olive leaf extract on glucose homeostasis in patients with prediabetes: a randomized double-blind placebo-controlled study. Arch Med Sci Atheroscler Dis. 2019. pubmed.ncbi.nlm.nih.gov/31448348. Funding: none listed on the PubMed record. COI: the authors declared no conflict of interest.
  18. Gaddam A, Galla C, Thummisetti S, Marikanty RK, Palanisamy UD, et al. Role of Fenugreek in the prevention of type 2 diabetes mellitus in prediabetes. J Diabetes Metab Disord. 2015. pubmed.ncbi.nlm.nih.gov/26436069. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  19. Demmers A, Korthout H, van Etten-Jamaludin FS, Kortekaas F, Maaskant JM. Effects of medicinal food plants on impaired glucose tolerance: A systematic review of randomized controlled trials. Diabetes Res Clin Pract. 2017. pubmed.ncbi.nlm.nih.gov/28750220. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  20. Amiri Ardekani E, Parvizi MM, Zare R, Mosaffa Jahromi M, Rampp T, et al. Exploring the Adverse Effects of Fenugreek in Humans: A Scoping Review. Iran J Med Sci. 2026. pubmed.ncbi.nlm.nih.gov/41625343. Funding: none listed on the PubMed record. COI: none declared.
  21. NHS. Low blood sugar (hypoglycaemia). Page last reviewed 3 August 2023. Checked 12 November 2026. nhs.uk. Funding: not applicable, this is official guidance, not a funded study.
  22. American Diabetes Association. Hypoglycemia (Low Blood Glucose). Checked 12 November 2026. diabetes.org. Funding: not applicable, this is official guidance, not a funded study.
  23. Lambert JP, Cormier J. Potential interaction between warfarin and boldo-fenugreek. Pharmacotherapy. 2001. pubmed.ncbi.nlm.nih.gov/11310527. Single case report. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
  24. Patil SP, Niphadkar PV, Bapat MM. Allergy to fenugreek (Trigonella foenum graecum). Ann Allergy Asthma Immunol. 1997. pubmed.ncbi.nlm.nih.gov/9087156. Case report of two patients. Funding: non-US government support noted on the PubMed record, funder not named. COI: no statement on the PubMed record.
  25. Faeste CK, Namork E, Lindvik H. Allergenicity and antigenicity of fenugreek (Trigonella foenum-graecum) proteins in foods. J Allergy Clin Immunol. 2009. pubmed.ncbi.nlm.nih.gov/18930518. Funding: non-US government support noted on the PubMed record, funder not named. COI: no statement on the PubMed record.
  26. Takei M, Homma Y, Saito A, Yanagida N, Sato S, et al. Fenugreek allergy caused by cross-reactivity with peanut: An in vitro analysis. J Allergy Clin Immunol Glob. 2024. pubmed.ncbi.nlm.nih.gov/39040656. Case report. Funding: Japan Agency for Medical Research and Development and the Consumer Affairs Agency, Government of Japan. COI: two authors reported advisory or lecture fees from drug companies.
  27. Korman SH, Cohen E, Preminger A. Pseudo-maple syrup urine disease due to maternal prenatal ingestion of fenugreek. J Paediatr Child Health. 2001. pubmed.ncbi.nlm.nih.gov/11532065. Case report. Funding: none listed on the PubMed record. COI: no statement on the PubMed record.
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