Zinc is an essential mineral, second only to iron as the most plentiful trace element in the body. It aids in the absorption of B vitamins, is a constituent of at least 25 enzyme systems, and is a component of insulin and of superoxide dismutase. Further, zinc is essential for growth and development of the sexual organs and prostate function. It is required for protein synthesis and collagen formation, promotes a healthy immune system, and healing of wounds. It is important for the formation of bones and plays a role in carbohydrate and phosphorus metabolism. Zinc also allows acuity of taste and smell.