What is Calcium, Magnesium & Zinc? Calcium is the most abundant, essential mineral in the human body. Of the two to three pounds of calcium contained in the average body, 99% is located in the bones & teeth. Magnesium & zinc are also essential minerals meaning that we cannot manufacturer them within the body yet we cannot survive without them. What Does Zinc do? Zinc may help to maintain a healthy immune system & help fight colds according to scientists. Zinc News: Take zinc to fight a cold, say scientists The best way to shake off a cold is to take supplements of the trace metal zinc, scientists say today. What Does Calcium, Magnesium & Zinc Do? May help to maintain healthy bones & teeth Zinc may help to maintain a healthy immune system