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.