BioTech USA Zinc Duo 60 Tablets 25 mg of zinc in daily dose. Contains 2 types of organic zinc: zinc bisglycinate (chelated amino acid) zinc gluconate Supports macronutrient metabolism. Contributes to normal protein synthesis. Supports cell protection against oxidative stress. It contributes to maintaining normal testosterone levels in the blood. It contributes to maintaining the immune system. The gluconate compound belongs to organic bonds and the elemental zinc content is sufficient. Chelation is a type of binding of inorganic zinc to an amino acid that creates an organic bisglycinate complex, which can be easily used by the human body. Note: We recommend consulting a doctor or nutritionist if you have any questions regarding the use of this product.