There is no such thing as which gastric mucosa protector is the best with the lowest side effects, because the efficacy and side effects of drugs vary from person to person, commonly used are magnesium aluminum carbonate tablets, aluminum thiosulfate and so on. Damage to the gastric mucosa is often caused by poor dietary habits, Helicobacter pylori infection, drinking a lot of alcohol and strong tea, medication, mental and psychological factors, and other reasons, related to diseases such as gastrointestinal dysfunction, acute and chronic gastritis, peptic ulcers and so on. Due to the increased secretion of gastric acid, the gastric mucosa causes irritation symptoms, so it is necessary to use gastric mucosa protector for treatment. Commonly used gastric mucosal protectants are magnesium aluminum carbonate tablets, aluminum sulfate, bismuth potassium citrate, misoprostol, etc. The choice of specific drugs needs to be based on the patient’s condition, such as Helicobacter pylori infection patients are often used bismuth potassium citrate, etc., gastric ulcers can be taken to take aluminum sulfate and so on. Gastric mucosa protectants need to be used under the guidance of a professional doctor to avoid triggering adverse reactions.