Eco-Friendly™. 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 eco-friendly: it is harvested in Okinawa Japan from fossilized (dead) coral and is not harmful to living coral.
"If you need magnesium, this is not the right product. If, on the other hand, you do not want much magnesium in a calcium supplement, this is a good choice. I did not realize how little magnesium comes with this product and will look for a different choice next time."