The human body needs more calcium than any other mineral. Among others- calcium is important for the formation and maintenance of healthy teeth and bones. Vitamin D’s most important role is maintaining blood levels of calcium- which it accomplishes by increasing absorption of calcium from food and-or supplements and reducing urinary calcium loss. Both effects keep calcium in the body and therefore spare the calcium that is stored in the bones. Sona Calcium with Vitamin D contains 600mg of calcium with added vitamin D for optimum absorption. Sona Calcium with Vitamin D provides as much calcium as a pint of milk in each- one-a-day tablet.