Why do we need calcium?

Cells & bone health: Calcium is an important element for bone strength (preventing osteoporosis and hip fractures) and important for basic cell function (as an electrolyte). Consult with your doctor on how much calcium you might need.

Calcium is necessary: Calcium is critical for the physiologic functions of enzymes, nerves, and muscles. It is the key constituent of the skeleton. It is the most important cation (salt or mineral) after sodium and potassium.