Calcium helps maintain bone density, and Bone Restore Calcium Supplement provides a total of 700 mg of three types of easily absorbed calcium: dicalcium malate, calcium fructoborate and calcium bisglycinate chelate, all delivered in a capsule that ensures full breakdown during digestion. But dietary calcium requires other nutrients to be most effective. Bone Restore includes vitamin D3 as well as boron (as patented Fruitex B® OsteoBoron®), magnesium and other minerals to support bone health. Vitamin D helps your body absorb calcium from the digestive tract into the bloodstream, making it vital for maintaining strong, healthy bones and teeth. Magnesium helps to maintain strong bones and a healthy vascular system. Zinc, manganese and silicon are other minerals that are essential for healthy bone maintenance.