The body needs calcium to make strong bones. Calcium is also needed for the heart, muscles, and nervous system to work properly. The bones serve as a storage site for the body's calcium. They are continuously giving up calcium to the bloodstream and then replacing it as the body's need for calcium changes from day to day. When there is not enough calcium in the blood to be used by the heart and other organs, your body will take the needed calcium from the bones. The calcium supplements will help calcium to be restored to the bones and the balance between your blood and bones will be maintained.