Caltrate 600 Plus D3 Calcium and Vitamin D Supplement Tablets offer the highest level of vitamin D3 (1) to help maximize calcium absorption and support healthy bones, joints and muscles. (2) Formulated with calcium carbonate nature's most concentrated form of calcium Caltrate bone health supplements contain 600 mg of calcium per tablet. Your body needs calcium for more than just strong bones; it also plays a role in supporting everyday activities like muscle contractions, blood clotting and nerve function. In addition to calcium, your body needs vitamin D to help calcium work for you. Caltrate calcium with vitamin D supplements contain high levels of vitamin D3 to help maximize calcium absorption and maintain healthy bones. (2) Take one to two tablets daily with food, or take these bone support supplements as directed by a physician to get the calcium and vitamin D your body needs to support healthy bones and muscles and keep you moving. (2) Caltrate calcium supplements are also available in 600 Plus D3 plus Minerals. (1) Per tablet; among leading calcium supplement brands. (2) These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.