The functions of the liver include detoxification, metabolism, and synthesis of bile. 1. Detoxification: After toxic substances are absorbed through the gastrointestinal tract, harmful substances in the blood and microbial antigenic substances will be detoxified and removed in the liver during the metabolic process of the body, and then transformed into low-toxic or non-toxic substances to be discharged into the intestinal lumen, and finally discharged out of the body through sweat, urine, stool, and so on. 2. Metabolism: The liver contains a large number of metabolic enzymes, the protein, fat, carbohydrates and vitamins that the human body ingests every day will be transferred to the liver after initial digestion in the gastrointestinal tract, where they will be broken down and metabolized, and then synthesized into the substances that the human body needs again. 3. Synthesize bile: The liver is an important digestive organ that synthesizes bile to aid in the digestion of food. Under the action of various enzymes in the liver, cholesterol undergoes a series of decomposition and metabolism, and eventually forms bile acids. The bile acids synthesized by the liver cells are combined with glycine or taurine and secreted into the biliary tract to become bound bile. In addition, the liver also has the functions of coagulation, immunity, etc. The liver is one of the important organs of the human body, and good habits should be maintained in daily life in order to protect the function of the liver.