Adequate calcium and vitamin D throughout life, as part of a well-balanced diet, may reduce the risk of osteoporosis. Adequate calcium is also important for teens and young adults and post-menopausal women.? In just one tablet, Nature Made Calcium 600 mg with Vitamin D provides 600 mg of calcium and 10 mcg (400 IU) of vitamin D3 to help meet your daily need for calcium. Calcium and vitamin D help support strong bones and teeth.? Two tablets provide 1200 mg of calcium for those with a higher recommended daily allowance, such as adults 50+. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.