The most abundant mineral in the human body, calcium has long been recognized for its ability to keep bones healthy and strong.
Most of the body's calcium is stored in the bones and teeth, where it is instrumental in keeping them strong. Calcium also facilitates the movement of nutrients across cell membranes. Since only 20% of adults' bone calcium is reabsorbed and replaced every year in the body, calcium supplements can be useful in helping to maintain strong, healthy bones, teeth and nails. Calcium is often taken in supplement form in combination with vitamin D and magnesium.
