Promotes healthy bones and teeth1,000 mg of calcium per servingContains vitamin D3 for enhanced calcium absorptionPotency and quality guaranteed​Getting enough calcium and vitamin D is essential for building strong bones and teeth and keeping them healthy as we age. About 99% of the calcium in our body is found in our bones and teeth. Although we shed calcium daily through everyday occurrences, like sweating, our body can\'t produce calcium. That\'s why it\'s so important to get it through our diet or a supplement. Carlson Cal-1000 provides 1,000 mg of calcium from calcium carbonate per serving. And 1,200 IU (30 mcg) of vitamin D3 is added for enhanced absorption.