Calcium carbonate. Calcium is needed by the body for healthy bones, muscles, nervous system, and heart. Calcium carbonate also is used as an antacid to relieve heartburn, acid indigestion, and upset stomach.
Vit D3. Necessary for normal absorption & utilization of calcium & phosphorus, cell division, normal bone structure, contributes to calcium & phosphorus absorption, maintenance of normal bones & teeth, muscle function, immune system function, role process of cell division.