Calcium and Vitamin D3 Dietary Supplement Tablets 600 CountSupports Healthy Bones & Teeth Supports Muscle Function Supports Immune System Calcium and Vitamin D3 is scientifically formulated to support overall health. It helps maintain and support bones and teeth, muscle function and immune health. Calcium is needed for the maintenance of normal bones, teeth and muscle function. Vitamin D contributes to normal absorption of calcium and phosphorus, and contributes to the normal function of the immune system.