Essential Vitamins & Minerals Complete Development 21 vital nutrients added for balanced growth and development. Rich in Vitamin A, Vitamin C & Vitamin E. Vitamin C is needed for the growth and repair of tissues in all parts of your body. Niacinamide is important for neural health and skin collagen. Zinc helps the immune system fight off invading bacteria and viruses. The body also needs zinc to make proteins and DNA, the genetic material in all cells.