Calcium Tablet is a Certified Product. As per many clinical trials it has been noticed that high-purity fossilized coral calcium contains calcium magnesium, sodium, zinc, potassium, iodine, essential trace minerals and many other microscopic elements essential to human life in addition fossilized coral calcium contains antioxidants known to help protect the body free radical damage. This is comprised of ecologically harvested from fossilized above-sea coral deposits unlike marine grade coral calcium.