Healthy pH BalanceImportant for Bone HealthMagnesium & Vitamin D for Bone MetabolismNon-GMOA Dietary SupplementMineralsFamily Owned Since 1968GMP Quality AssuredNOW® Coral Calcium Plus is an excellent source of an alkaline form of Calcium that can help to support a healthy acid-base balance. In addition, Coral Calcium has naturally occurring trace minerals that are important for bone health, as well as for optimal enzymatic activity. NOW® Coral Calcium is not harvested from living coral reefs or even from the ocean environment, but form above-ground sources in an ecologically friendly manner. In this Coral Calcium Plus formula, Magnesium and Vitamin D have been included for their essential roles in bone metabolism.