AUST L 213896 Pharmacy Care Calcium is a high potency calcium supplement which assists in the prevention and treatment of osteoporosis where dietary calcium intake is inadequate. Calcium is a mineral that is required for developing and maintaining strong, healthy bones and teeth, plus many crucial bodily functions including proper muscle contraction and nerve transmission. Most calcium in the body is stored within bones and teeth, where it adds strength and density to those structures. If there is not enough calcium available in the blood for its other vital functions, the body removes calcium from storage in bones.