Starcal D is the preparation of Calcium Carbonate and Vitamin D3 (Cholecalciferol). Calcium is necessary for many normal functions of our body, especially bone formation and maintenance. Vitamin D3 helps for the absorption & reabsorption of Calcium. Vitamin D3 also stimulates bone formation. Clinical studies showed that Calcium and Vitamin D3 all together helps in bone growth, and in prevention of osteoporosis & bone fracture.