ZMA stands for zinc monomethionine aspartate and is a supplement used by bodybuilders and serious athletes to increase sterone and IGF-1 in the body. ZMA combines zinc, magnesium and vitamin B6, all three of which play an important role in metabolism. In addition, most people do not get enough magnesium in a typical diet. Studies have shown that these supplements can lead to increased muscle mass, increased muscle strength, and increased levels of anabolic hormones. ZMA supplements are also useful for athletes, as vitamins and minerals such as zinc and vitamin B6 are depleted when they exercise. In addition to higher free sterone levels, ZMA may also improve sleep quality. The product is also ideal for those looking for an all-natural boost to their workouts and has been proven to have no known negative side effects.