Zinc Citrate 270 tabletsZinc is a component of 300 enzymes and proteins in the body and is involved in cell division, fertility, vision, growth and repair and protein synthesis. Studies also suggest it has an antioxidant role and therefore it may help to maintain a healthy immune system. As good sources of zinc are generally in animal foods, such as organ meats and seafood, many people may need to take a zinc supplement to safeguard against low intakes.