Source of trace minerals. Optimal 2:1 ratio of calcium and magnesium. Coral is among one of the oldest organisms. GNC Coral Calcium naturally supplies calcium, magnesium and numerous other essential trace minerals. Gathered from fossilized coral from above the Okinawan sea, our coral is environmentally friendly. This harvesting process protects the delicate ecology of the sea and allows living reefs and algae to continue to thrive. † |