Zinc A.G. features zinc as a true amino acid chelate with arginine and glycine designed to be highly absorbable and well tolerated. Zinc is especially important for immune and tissue health. In addition, zinc is a component of numerous enzymes in the body related to energy metabolism , bone mineralization, and protein synthesis—and plays a role in male reproductive health. Ingredients: Microcrystalline cellulose, croscarmellose sodium, stearic acid (vegetable), silica, and magnesium stearate (vegetable).