Zinc is called an "essential trace element" because the very small amount of zinc is necessary for human health. Sunshine Nutrition Zinc 50 mg Tablets provides Zinc in its Gluconate form which helps to meet your daily requirements of this essential mineral for overall good health. Zinc supports antioxidant function and helps maintain healthy hair, nails, and skin. It is also used for boosting the immune system, treating the common cold and preventing lower respiratory infections. Zinc plays a key role in maintaining vision, and it is present in high concentrations in the eye. Zinc deficiency can alter vision, and severe deficiency can cause changes in the retina.