ZMA is a supplement containing zinc monomethionine aspartate, magnesium asparate and vitamin B-6 in precise ratios and is produced by a company called SNAC System. They own the trademark - ZMA™. They license and sell this material to many supplement companies that are then allowed to market the product using the ZMA name. If you feel like you should try ZMA make sure it is the real stuff by SNAC Systems and not a knockoff. Only the ZMA made by SNAC Systems has the formulation used in the research literature. It's not that expensive and could be worth the cost of admission. Remember, do not fall for the knockoffs out there. If you want to know if ZMA will work for you, you need to use the real deal. Companies might tell you that theirs is the same as SNAC's, but they're not.