Nutritional Calcium with Vitamin D is formulated with a highly absorbable form of Calcium along with Vitamin D3 (400 IU) to maintain normal bone health. The Vitamin D in the formulation assists in the absorption of Calcium and may help to maintain a healthy immune system when combined with regular exercise and a balanced diet. , Directions: As a dietary supplement for adults, take one (1) tablet daily preferably at mealtime, or as directed by the healthcare practitioner.