Dietary supplement. Coral calcium contains the alkaline minerals calcium and magnesium, as well as other essential trace minerals. An initial study on an alkaline mineral blend demonstrated an increase in blood alkalinity (pH) and buffering capacity. Proper alkalinity (pH) of the blood is critical for the overall health of the body. Source Naturals Coral Calcium is harvested in Okinawa, Japan from fossilized (dead0 coral and is not harmful to living coral. (These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.) Hypoallergenic: Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.