Other Information: Each tablet contains: Elemental calcium 300 mg. Do not use if printed seal under cap is torn or missing. Store at room temperature. Keep the container tightly closed. Misc: Calcium carbonate. Relieves heartburn and acid indigestion. Compare to Tums Extra Strength 750 active ingredient (This product is not manufactured or distributed by GlaxoSmithKline LLC, owner of the registered trademark Tums). supervaluprivatebrands.com.