Zinc What Is Zinc? Did you know that zinc is an important co-factor for enzymes involved in the proper functioning of your antioxidant defence system superoxide dismutase (SOD)? Zinc is critical to overall health and is present in every single cell in the human body. It is the second-most-abundant trace mineral after iron and is considered an essential nutrient; meaning that the body cannot produce or store it, so it must be supplied through diet and/or supplementation. https://www.nationalnutrition.ca/minerals/single-minerals/zinc.html #Zinc