The liver is the main metabolic organ in the body, and its main roles and functions are metabolism, detoxification, secretion and excretion of bile, hematopoiesis, and coagulation. 1. Metabolism: The liver is able to promote the metabolism of vitamins, and if liver function is impaired, vitamin deficiencies may occur. It also promotes the metabolism of hormones, and if liver function is impaired for a long period of time, it can easily lead to the imbalance of sex hormones in the body. 2. Detoxification: The liver is able to metabolize and decompose toxic substances produced by foreign or internal metabolism, and excrete them with bile or urine. If the function of the liver is affected, it will lead to a decrease in detoxification function and toxins cannot be excreted normally. 3. secretion and excretion of bile: the liver is able to produce bile and send it to the gallbladder through the bile ducts, thus concentrating and discharging bile and promoting digestion and absorption. 4. hematopoiesis and coagulation: the liver has an important hematopoietic function during fetal life. At the same time, the liver is able to produce clotting factors, which play an important role in the balance of coagulation and anticoagulation.