The thing is that fenugreek extracts haven’t always performed this well on scientific studies. Although in rodents, the extract increased muscle growth, it failed to have any impact on circulating testosterone levels 5 . In an effort to replicate the first human study sponsored by Indus Biotech, Bushey et al. found that in their trial, fenugreek did not increase either free or total testosterone levels, but it ended up lowering DHT due to 5-a reductase inhibitory effect 6 . Lastly, a study using 600mg/day of fenugreek extract called “Testofen” on healthy male subjects, failed to show any increases in testosterone levels 7 .
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