Originally Posted by savchief
Not true, I just looked and there are exactly ZERO studies say ZMA has any effect on anything, and there are well-designed double blind studies showing it has zero effect on testosterone. So the feeling more "manly" is pure placebo. Sleep evidence is all word of mouth (anecdotal). No studies have been done as far as I see pertaining to sleep benefits.
One study had "evidence" that it increased testosterone, but that study was done by ZMA creator, Victor Conte of BALCO infamy. The study has been discredited and has never been duplicated.
But the placebo effect is often just as real for those who feel it. If you believe it's giving you better sleep, then enjoy. Only thing getting hurt is your wallet.
It would only make you "feel more manly" if you were already deficient in zinc. Then yes, it would help raise natural test levels.
But either way, you're wrong.