Bile acid is an organic acid, the efficacy and functions of bile acid are mainly as follows: First, it has certain therapeutic effects on bronchitis and chronic bronchitis; second, it can protect the mucosa of the gastrointestinal tract of patients and prevent mucosal damage; third, when patients’ bile encounters excretory function disorders, they can borrow bile acid to assist digestion and reduce the chances of diarrhea; fourth, when cholecystitis and bile deficiency occur, oral bile acid can be used for treatment. It can replace part of the gallbladder and is very well tolerated overall; V. It can also lower blood lipids, treat hyperlipidemia and relieve cholecystitis. Bile acid is very effective but cannot be reused, and the use of it requires attention to adverse reactions.