Grinding cuttlefish bone into powder will stop acid and relieve pain. There is calcium carbonate in cuttlefish bone, which can neutralize gastric acid, relieve the symptoms of acid regurgitation and heartburn, promote the absorption of inflammation on ulcer surface, prevent bleeding and relieve local pain. And brushing teeth with cuttlefish bone powder can whiten teeth. The principle is to achieve the whitening effect by grinding the tooth surface with the effective component of cuttlefish bone, calcium carbonate.