Optimum nutrition® ZMA Capsules is a supplement made up of two minerals - zinc and magnesium and vitamin B6. It has many beneficial factors, including better muscle recovery, increased strength and size. It may also helps to improve the quality of your sleep. Because athletes and active adults have greater, higher nutrient needs than inactive people, it provides more than ample amounts of Zinc, Magnesium and Vitamin B6. This novel Zinc Monomethionine Aspartate formula can help to fill the gaps in your micronutrient intake.