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. Take 1 capsule twice daily, preferably before meals with water.