NutriStack
Fenugreek and Testosterone, a caution.
Fenugreek extracts (especially standardized products like Furosap) modestly raise free testosterone in men in small clinical trials. Layering fenugreek on top of prescribed testosterone is unlikely to add benefit and may push androgenic side effects (acne, mood changes, polycythemia) higher.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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At a glance
- Substances
- Fenugreek and Testosterone
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Fenugreek extracts (especially standardized products like Furosap) modestly raise free testosterone in men in small clinical trials. Layering fenugreek on top of prescribed testosterone is unlikely to add benefit and may push androgenic side effects (acne, mood changes, polycythemia) higher.
Mechanism. Fenugreek saponins (protodioscin, fenuside) appear to inhibit aromatase and 5-alpha-reductase modestly, raising free testosterone and shifting the androgen-to-estrogen ratio. Stacking with exogenous testosterone amplifies androgen tone without proven benefit.
Recommendation. Avoid routine fenugreek supplementation if you are already on prescribed testosterone therapy. If you wish to use fenugreek, discuss with your prescriber and monitor hematocrit, PSA, and mood. Fenugreek can also lower blood glucose, which is a separate consideration.
Sources (2)
- Maheshwari A, Verma N, Swaroop A, et al. Efficacy of FurosapTM, a novel Trigonella foenum-graecum seed extract, in Enhancing Testosterone Level and Improving Sperm Profile in Male Volunteers. Int J Med Sci. 2017;14(1):58-66. PMID 28138310
- Leisegang K, Finelli R, Sikka SC, Panner Selvam MK. Eurycoma longifolia (Jack) Improves Serum Total Testosterone in Men: A Systematic Review and Meta-Analysis of Clinical Trials. Medicina (Kaunas). 2022;58(8):1047. PMID 36013514
Stack Score
How this pair moves the number.
Effect on the composite score
If both Fenugreek and Testosterone are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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