Similar to our regular coral calcium, NOW Coral Calcium Magnesium has incorporated these two highly beneficial minerals, and is pleased to deliver them to you in one easy to use supplement. Coupled with the unparalleled quality of coral calcium, the addition of magnesium makes this one of our finest products to date. Essential in the development and maintenance of healthy bones and skeletal tissue, NOW Coral Calcium Magnesium is a safe and effective way to attain positive structural longevity.