Protect Your Bones with OsteoMatrix. You need more than just calcium to build strong bones. OsteoMatrix provides a unique matrix of critical nutrients including calcium,vitamins D & K,magnesium,and more to build and maintain strong bones. It's clinically proven to increase calcium absorption,and its small,coated caplets are easy to swallow! Now withNEW higher levels of Vitamin D,clinically supported for bone,heart and immune health.