Coral Pure Calcium uses premium grade, 100% pure, ionized bio-available marine coral calcium known as CoraMax. Collected from the deep ocean waters of Okinawa, Japan. With ecological safety overseen by the Japanese government for the protection of the coral reefs and marine life. CoraMax provides important marine nutrients and minerals, retaining the coral calcium in its most natural state. The CoraMax name guarantees that your coral calcium is harvested and processed according to the highest standards.