Fenugreek
Also known as: Trigonella foenum-graecum, methi, fenugreek seed extract, FenuflakesTM, TrigozimR
Effective Dosage
500–1800 mg daily depending on use case (lactation, blood sugar, testosterone)
What the Science Says
Fenugreek is a seed-based herb used in cooking and traditional medicine for centuries. Clinical trials suggest it may modestly reduce blood sugar spikes and improve glycemic control in people with type 2 diabetes, and may temporarily increase breast milk volume in mothers of preterm infants. Some evidence hints at a small increase in testosterone levels in men, though results only reached statistical significance in saliva measurements — not blood plasma — compared to placebo.
What It Doesn't Do
Won't reliably boost testosterone in blood — the one RCT showed no significant difference vs. placebo in plasma testosterone. Doesn't consistently raise prolactin levels. No proven effect on muscle building, fat loss, or libido based on the available studies. Not a proven cancer treatment — the oral lesion study was tiny and results were mixed.
Evidence-Based Benefits
A systematic review of 6 RCTs (PMID 36983608) found that fenugreek supplementation was associated with improvements in muscle strength, endurance, lean body mass, and reduced body fat in some trials, with potential anabolic/androgenic activity via glycosides and saponins. One RCT in the same review noted improved muscle glycogen resynthesis post-exercise, and fenugreek combined with creatine improved creatine uptake. In fish models (PMID 28232283), fenugreek demonstrated antioxidant activity by increasing superoxide dismutase and catalase expression in liver tissue.
Weak EvidenceEffective at: No established dose (insufficient research data)
Source: auto-research
Absorption & Bioavailability
Unknown — no pharmacokinetic studies for fenugreek were included in the provided data. Formulation type (whole seed, defatted flakes, extract) likely affects absorption.
Red Flags to Watch For
- Most studies are small (under 25 participants per group), limiting confidence in results
- Testosterone effects only reached significance in saliva, not blood plasma — a weaker and less validated measure
- The lactation benefit disappeared by day 15 of the study, suggesting effects may be short-lived
- Several papers in this dataset are irrelevant to human health (mining dust suppression, poultry feed, plant phytoremediation) — reflects how broadly 'fenugreek' appears in unrelated research
- Products vary widely in form and dose — 'fenugreek' on a label tells you very little about what you're actually getting
Products Containing Fenugreek
See how Fenugreek is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06