Chooz Antiacid/Calcium Supplement Mint Gum works fast to relieve acid indigestion, sour stomach, heartburn and upset stomach. Heartburn an issue? Try Chooz Antacid/Calcium Supplement Gum as your sodium-free, sugar-free, great-tasting option to relieve the symptoms of heartburn, sour or upset stomach. Chooz Antiacid/Calcium Supplement Mint Gum builds strong bones. New mint flavor.