Zinc is an essential mineral involved in more than 200 enzyme systems in the body and plays an important role in protein metabolism. Zinc is also essential for growth and tissue repair and is needed for healthy reproductive and immune systems. Vitamin C, bioflavonoids, vitamin E and beta-carotene have been added for their combined antioxidant action. Vitamin B6 is an important co-factor in more than 100 enzyme reactions in the body, often in conjunction with zinc. Folic acid and vitamin B12 are known to play a part in helping to maintain normal homocysteine levels in the body. To maintain the correct zinc to copper ration a small amount of copper is included. Vitamin B complex has been added to complement the other B vitamins contained in the formula.