Why does fenugreek make me smell like maple syrup?

Fenugreek contains a compound called sotolon with a strong maple-like aroma that passes into sweat and urine. It's harmless, but in newborns the odor has been confused with a rare metabolic disorder — so tell your baby's care team if you took it near delivery or while nursing.

Can fenugreek replace my diabetes medication?

No. Small studies suggest modest effects on blood sugar, but it isn't a substitute for medical care. If you want to try it, talk to your provider first, since combining it with glucose-lowering medicine can push blood sugar too low.

Does fenugreek raise testosterone?

A few small trials of specific extracts report modest increases, and some report improved libido, but results are inconsistent and many studies were industry-funded. If you have symptoms of low testosterone, a blood test and a visit with your provider will tell you far more than a supplement trial.

← Supplement library

Fenugreek

Botanical & herb · Also known as: Trigonella foenum-graecum; methi; fenugreek seed; fenugreek seed extract

Evidence reviewed by Troy Hounshell, PT, ScD · Last reviewed September 10, 2026

A kitchen spice with small, inconsistent effects on blood sugar and testosterone — and a maple-syrup scent.

Want to try Fenugreek?

See our pick — chosen for form and dose — in our professional dispensary. Please read Safety & interactions first.

Buy on Fullscript →

You'll create a free Fullscript account and check out through our professional dispensary — 20% off retail.

We may earn a commission on Fullscript purchases, at no extra cost to you. Affiliate Disclosure

What it is

Fenugreek is a clover-like plant in the legume family whose seeds are a common spice in South Asian and Middle Eastern cooking. Supplements use the ground seed or concentrated seed extracts.

How it works

Fenugreek seeds are rich in a soluble fiber (galactomannan) that may slow how quickly sugar is absorbed after a meal, and they contain compounds like 4-hydroxyisoleucine that influence insulin release in lab studies. For testosterone, it's proposed that saponins in the seed (such as furostanol glycosides) affect hormone-related enzymes, but this remains unproven in people. How it might affect breast milk production isn't well understood.

What it's been studied for

Commonly taken for blood sugar support, testosterone and libido in men, and breast milk supply.

What the evidence shows

Mixed and mostly modest. Meta-analyses of small trials suggest fenugreek seed may modestly lower fasting blood sugar and HbA1c in people with diabetes, and a handful of short, often industry-funded trials of specific extracts report small increases in testosterone and libido; evidence for boosting breast milk supply is weak and inconsistent. The key limitation is that trials are small, short, and vary widely in dose and preparation.

Who should consider it

People with prediabetes or type 2 diabetes who want to try it should do so only with their provider's input — especially if they take glucose-lowering medicine. Men curious about libido or testosterone may see small effects at best, and anyone concerned about low testosterone deserves a proper evaluation. Nursing parents with low milk supply are usually better served by a lactation consultant, since fenugreek's evidence is weak and it may upset some infants' stomachs.

Amounts commonly studied

Blood-sugar studies typically used powdered seed, ranging from a few grams to much larger amounts per day; testosterone and libido trials commonly used standardized seed extracts of about 500 to 600 mg per day.

How to take it

Seed powder is often taken with meals, which fits its proposed effect on after-meal blood sugar; extracts were typically taken once or twice daily. Studies generally lasted a few weeks to a few months. If you take diabetes medicine, talk to your provider before starting and check your blood sugar more closely.

Forms & absorption

Whole or powdered seed, seed extracts standardized to compounds like saponins, and teas. The fiber in whole seed likely contributes to blood-sugar effects, so extracts and powders may not behave the same way.

Food sources

Fenugreek seeds and leaves (methi) are used in curries, spice blends, dals, and flatbreads across South Asian, Middle Eastern, and North African cooking; the seeds also flavor some imitation maple syrup.

Safety & interactions

Gas, bloating, and diarrhea are common, and it can make sweat and urine smell like maple syrup. It may add to the effects of diabetes medicines and cause low blood sugar, may increase the effect of blood thinners like warfarin, and can trigger reactions in people allergic to peanuts, chickpeas, or other legumes. Avoid amounts beyond normal cooking use during pregnancy, since it may stimulate uterine contractions, and talk to your provider before using it while breastfeeding or if you have a hormone-sensitive condition.

Myths & what it won't do

Myth: fenugreek is a proven testosterone booster. Reality: the evidence comes from a handful of small, short trials, many funded by extract makers, and effects were small and inconsistent. Myth: fenugreek reliably increases breast milk. Reality: studies are few, small, and conflicting, and it can cause digestive upset and a maple-syrup odor in both parent and baby.

Common questions

Why does fenugreek make me smell like maple syrup?: Fenugreek contains a compound called sotolon with a strong maple-like aroma that passes into sweat and urine. It's harmless, but in newborns the odor has been confused with a rare metabolic disorder — so tell your baby's care team if you took it near delivery or while nursing.
Can fenugreek replace my diabetes medication?: No. Small studies suggest modest effects on blood sugar, but it isn't a substitute for medical care. If you want to try it, talk to your provider first, since combining it with glucose-lowering medicine can push blood sugar too low.
Does fenugreek raise testosterone?: A few small trials of specific extracts report modest increases, and some report improved libido, but results are inconsistent and many studies were industry-funded. If you have symptoms of low testosterone, a blood test and a visit with your provider will tell you far more than a supplement trial.

The amounts listed here are what published research has used — not a prescription or a recommended dose for you. Confirm anything you plan to take with your own healthcare provider, especially if you take medications, are pregnant or nursing, or have a health condition.

Research on Fenugreek

Recommendations on this page are informed by published research. This is educational information, not medical advice.

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;13:7. View study →Note: Fenugreek lowered fasting glucose and HbA1c, mainly at medium-to-high doses in people with diabetes; most trials were low quality.
Mansoori A, Hosseini S, Zilaee M, Hormoznejad R, Fathi M. Effect of fenugreek extract supplement on testosterone levels in male: A meta-analysis of clinical trials. Phytother Res. 2020;34(7):1550-1555. View study →Note: Pooled just four trials and found fenugreek extract raised total testosterone in men.

Buy on Fullscript →Take the quiz →