Zinc has many beneficial roles in the body, including contributing to: The maintenance of normal bones, hair, skin and nails, the normal metabolism of fatty acids, vitamin A & Carbohydrates. Normal DNA synthesis, normal protein synthesis, Normal cognitive function, Normal fertility and reproduction, normal testosterone levels in the blood, normal immune function and normal acid base metabolism. Zinc also plays a role in cell division. 1 natures Aid Zinc Picolinate tablet will provide the full RDA for zinc., , Directions for Use: Take 1 tablet per day with food. Do not exceed the recommended intake.