Important for Bone Health* 350 mg of Calcium NOW Coral Calcium is an excellent source of an alkaline form of Calcium that can help to support a healthy serum pH.* 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 from above-ground sources in an ecologically friendly manner. Natural color variation may occur in this product.