Pure Nutrition Zinc-ZMA is a ZMA supplement that is formulated with zinc, magnesium, and vitamin B6. Along with the above vital nutrients, these zinc tablets also contain L-tyrosine to enhance the mood, which may assist in better sleep and recovery of body and mind. Zinc is essential for skeletal growth, bone homeostasis, and bone regeneration. Additionally, it helps fight off invading pathogens and bacteria, thereby strengthening the immune system. Magnesium in the supplement activates the parasympathetic nervous system, which makes your mind and body calm and relaxed.