So after reading about ZMA and the wonderful anabolic attributes it provides I bought a bottle. I've been doing more research and came across a study conducted in 2004 which found contrary evidence to the original study in 1999 regarding ZMA's effectiveness at much of anything.
I believe the original studies were done on marines who were extremely zinc deficient. If you are zinc or magnesium deficient (which, most hard-training athletes are without supplementation)a good ZMA is essential.
Personally I don't sleep any better on it, but it has helped me feel more recovered, at least subjectively.
To your knowledge, are the authors of the linked study affiliated with a supplement manufacturer?
I understand it is intended to aid sleep and it does seem to do that for me, but it is also purported to raise free testosterone levels by as much as 30%. This study seems to indicate that is not the case.
I'm just wondering. I've spent money on "hot" supplements before only to find out later their claims were bunk and any potential benefit I felt was just a placebo effect.
I just don't want to take an expensive multi vitamin.