From the manufacturer
NOW 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 from 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.* Natural color variation may occur inthis product.