Calcium promotes healthy, strong bones and is helpful in muscle contractions. and nerve impulses. The addition of D3 assists with the absorption of Calcium. while also supporting a healthy immune system. Adequate calcium and vitamin D. as part of a healthful diet, along with physical activity, may reduce the risk. of osteoporosis later in life. These statements have not been evaluated by. the Food and Drug Administration. The product is not intended to diagnose,.