ZMA zinc & mono l-methionine magnesium aspartate and vitamin B6 is a supplement used primarily by gymnasts, and bodybuilders. It is said to boost muscle growth and strength as well as improve endurance, recovery and sleep quality. Helps boost Testosterone and IGF-1 in the body. The three ingredients.  * Zinc. This trace mineral is necessary for more than 300 enzymes involved in metabolism, digestion, immunity, and other areas of your health. * Magnesium. This mineral supports hundreds of chemical reactions in your body, including energy creation and muscle and nerve function. * Vitamin B6. This water-soluble vitamin is needed for processes such as making neurotransmitters and nutrient metabolism.