* Supports Bone Health * High Percentage of Calcium * GMP Quality Assured * A Dietary Supplement * Vegetarian Product NOW Calcium Carbonate is a basic calcium supplement that contains one of the highest concentrations of elemental calcium (about 40%), making it an optimal formulation for supporting healthy bones and teeth. NOW has been selling powdered supplements since 1968 because of their distinct advantages. The powdered form is 100% pure, and free of fillers and preservatives, much lower in cost, easy to digest and can be taken in desired potencies. Powdered vitamins and minerals are truly the best way to take supplements.