What to take for testosterone / hormone levels
Graded by the strength of the evidence — strongest first. Nothing here is sold to you.
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".