ZMA is a supplement consisting of zinc, magnesium, and vitamin B-6, all of which are vital for biological processes. It was developed in an attempt to provide athletes and bodybuilders with a means to prevent the loss of these vitamins and minerals through exercise, as well as to promote additional benefits similar to those of prohormone drugs.
Zinc, magnesium, and vitamin B-6 are all involved in the metabolic processes of the body, and play a vital role in protein synthesis. During exercise, these nutrients are lost, either through perspiration or metabolism. The function of ZMA supplementation then is to replace these nutrients which, in turn, may facilitate a number of processes that may improve athletic performance.