The nutritional supplement ZMA is composed of Vitamin B6, magnesium aspartate, monomethionine aspartate and zinc. It is most often taken to improve memory, build muscle and enhance athletic performance. It could help you rebuild and repair the muscles during the night time by helping sleep more deeply and soundly. ZMA has the ability to aid the immune system as well as raise testosterone in men because of its high zinc count. Because it contains Vitamin B and magnesium it may naturally raise your energy levels.