Dietary Supplement. Imported From Okinawa Certified by an Independent Laboratory GMP. Features Tropical Oasis natural Coral Calcium, Magnesium and Vitamin D capsules is a calcium supplement your body can really absorb. Your body poorly processes conventional tablets, giving you little benefit, and calcium deficiency largely results from poor absorption. Tropical Coral Calcium is a special blend of including Vitamin D and Magnesium which are vital for calcium to absorb. The calcium from the coral minerals are naturally ionized allowing for almost total bio-availability, meaning your body can absorb it. We probably need more Calcium & Magnesium than any other vitamin or mineral. Yet Calcium remains high on the list o.