Zinc is a trace mineral that all human beings require for a variety of different bodily functions. It contributes to the normal function of the immune system and metabolism of carbohydrates, fats and proteins, and also helps maintain normal Test levels in the blood as well as keeping the vision normal. The mineral is also important for the maintenance or normal skin, hair, nails and bones. Furthermore, zinc is vital for keeping cognitive function normal and protects the cells from oxidative stress.