Immune SupportHighly Bioavailable FormSupports Enzyme FunctionWith CopperNon GMOA Dietary SupplementVegetarian/VeganKosherMineralsFamily Owned Since 1968GMP Quality AssuredHalal L-OptiZinc® is a form of zinc complexed with the amino acids methionine. Research has demonstrated this product to be better absorbed and retained longer compared to several other forms of zinc tested.