Supports a healthy Immune System Zinc supports the health of the immune system, normal synthesis of protein, and the health of reproductive organs (especially in men). Zinc supports the health of the immune system, normal synthesis of protein, and the health of reproductive organs (especially in men). Zinc deficiency is common, and can adversely affect normal physical growth, skin and nerve health, natural healing ability, and immune function, especially in infants. Zinc is an essential part of over 200 enzymes that make RNA and DNA, cell membranes, muscles and bones.