Sona Calcium with Vitamin D contains 600mg of Calcium with added Vitamin D for optimum absorption. Calcium and Vitamin D are important for normal bones and teeth, cell division and muscle function. Calcium is also needed for blood coagulation, function of digestive enzymes, neurotransmission and energy. Vitamin D is important for the absorption and utilisation of calcium and phosphorus, maintenance of normal blood calcium concentrations, the normal function of the immune system and inflammatory response.