Calcium is such a vital mineral to maintian good health, and many of us do not get enough from our diets, and are most likely calcium deficient. When we are not getting enough calcium and our body is in need, it will take calcium from your bones to support other bodily functions, and if this is repeated after a long period of time it will lead to deminishing bones and other possible health issues. So in most cases, since it is hard to get adaquet amounts of calcium from food most of us need to be taking a calcium supplement to make sure we are giving our body enough to stay healthy.