We use only the finest patent-pending ZMA that has been scientifically proven to be 2 1/2 times stronger than a placebo! ZMA is the only non-steroidal, all natural dietary supplement that is 100% clinically proven to increase Testosterone levels and increase strength in athletes. In an eight week double blind, placebo controlled study with college football players, ZMA was found to increase total plasma testosterone levels by 32.4%, increase Insulin-Like Growth Factor by 3.6%, increase free testosterone levels by 33.5%, and increase muscle strength by 11.6%. This study is conclusive because the testosterone levels and IGF-1 levels actually dropped in the placebo group overnight, whereas with the ZMA group, it jumped considerably. Increased muscle tissue growth and recovery can only be accomplished if your body is kept in an anabolic state for a considerable length of time. ZMA will help your body to stay in this anabolic state thereby increasing your body’s overall lean muscle mass. ZMA® is a registered trademark of SNAC System, Inc. (U.S. Patents 4,764,633 and 5,278,329) L-OptiZinc® is a registered trademark of InterHealth, N.I