The product components contribute to the proper structure of bones and proper muscle function. Calcium is needed for the maintenance of normal bones and normal teeth. It contributes to normal energy-yielding metabolism, normal muscle function and normal neurotransmission. Vitamin D contributes to normal absorption/utilisation of calcium and phosphorus and normal blood calcium levels. It also contributes to the maintenance of normal bones, normal muscle function, and normal teeth. Also, vitamin D contributes to the normal function of the immune system. Vitamin K contributes to the maintenance of normal bones.