Zinc is a trace element that is very versatile. It strengthens the immune system, can improve cognitive performance and also acts as an antioxidant. According to the World Health Organization (WHO), half of all people do not take in enough zinc. The reason for a zinc deficiency is usually an insufficient diet that is too one-sided. The trace element is after iron the second most common mineral in the body. In this article you will learn for which biochemical processes zinc is responsible and why you should always pay attention to an adequate supply.