Swisse Ultiboost Calcium + Vitamin D is a premium quality formula to help support healthy bones and teeth and provide a source of calcium which may assist in the prevention and treatment of osteoporosis. A diet deficient in calcium may contribute to osteoporosis in later life. Calcium and vitamin D are also important to help maintain strong, healthy bones and teeth. The human skeleton consists of 206 bones that provide a framework for the body to help maintain shape, protect vital organs and provide a place for muscles to attach. Bones also function as a site for mineral storage and blood cell formation. It is also suggested that magnesium may assist in the apsorbtion of calcium.