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EvidenceBased
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EvidenceBased

What to take for testosterone / hormone levels

Graded by the strength of the evidence — strongest first. Nothing here is sold to you.

Vitamin Dgrade C— Meta-analysis in men: vitamin D supplementation may increase TOTAL testosterone, but showed no significant effect on free testosterone, FSH, LH, SHBG, free androgen index or estradiol. The isolated total-testosterone signal is modest and the authors call for further well-designed RCTs.
Ashwagandhagrade D— Systematic review of 4 trials (only 1 RCT, mostly uncontrolled before-after): testosterone up 17%, LH up 34%, semen concentration +13.57 million/ml; authors call their own evidence "too limited to provide sufficiently robust evidence".