According to the official health claims of the European Food Safety Authority (EFSA), zinc contributes to:
The normal function of the immune system.
The maintenance of normal hair, nails and skin.
The protection of cells from oxidative stress.
The maintenance of normal testosterone levels in the blood.
Normal fertility and reproduction.
Normal cognitive function.
The maintenance of normal vision.
The maintenance of normal bones.
The normal metabolism of carbohydrates, macronutrients, fatty acids and vitamin A.
Normal DNA and protein synthesis.