Vitamins and minerals are essential for normal metabolic functions including hematopoiesis. The members of vitamin B-group are components of enzyme system that regulate various stages of carbohydrate, fat and protein metabolism, each of the components playing a specific biological role. Vitamin C is involved in tissue repair and collagen formation. Vitamin A plays an essential role in the function of retina and is essential for growth and differentiation of epithelial tissue. Vitamin E is an antioxidant which preserves essential cellular constituents. Vitamin D is supplemented for prevention and cure of nutritional and metabolic rickets and for treatment of hypoparathyroidism. Iron, Copper, Manganese, Zinc serve as catalysts in enzyme systems which perform vital cellular functions.