15 mg Zinc (L-Methionine) 1 mg Copper Supports Immune and Antioxidant Protection Dietary Supplement L-OptiZincZinc Balance is a synergistic combination of Zinc L-Methionine and Copper Gluconate in a 15:1 ratio of zinc to copper. Zinc L-Methionine resists absorption interference from fiber and phytic acid.The mineral zinc supports skeletal and immune health. Both zinc and copper are needed to support super oxide dismutase (SOD) activity, which plays a critical role in the body's endogenous antioxidant network.