The liver is the largest digestive gland in the body and the center of metabolism in the body. It is estimated that more than 500 chemical reactions occur in the liver. Specifically, the liver is mainly engaged in the following five kinds of “work”. 1, synthesis function. Grains and cereals into the digestive tract, after digestion, hydrolyzed to glucose, to be transported to the liver, and then absorbed by the body. Glucose is transported to the liver, part of which is stored in the liver as glycogen for later use. Amino acids absorbed from the digestive tract also undergo protein synthesis, deamination and transamination in the liver. The liver is also the main synthesis site of a variety of coagulation factors, 12 kinds of coagulation factors in the human body, 4 of which are synthesized in the liver. 2. Decomposition function. The liver is the body’s main detoxification organ, it can protect the body from damage. Certain metabolic wastes or intestinal bacterial spoilage products as well as medications taken by the body, etc., are processed by the liver, and the toxic substances become non-toxic, less toxic, or easily dissolved substances to be discharged from the body, and this process is called detoxification. 3.Filtering function. Hormones are synthesized in the endocrine organs to regulate various body functions in trace amounts. Most hormones undergo chemical changes in the liver and are excreted. For example, thyroid hormone, estrogen, aldosterone and antidiuretic hormone are metabolized in the liver. Therefore, when liver disease is severe, there will be an imbalance of hormone levels, affecting the normal function of the body. 4. Storage function. The liver can store fat-soluble vitamins, 95% of the body’s vitamin A are stored in the liver. Liver or vitamin C, D, E, K, B1, B6 and other storage and metabolism place. Iron is an important component of hemoglobin, the liver stores more iron than all the blood in the body contains iron. 5. Produce bile. Bile is the digestive fluid that helps absorb lipids and fat-soluble vitamins. The liver produces bile, which is then transported to the gallbladder and stored there, where it is concentrated and then discharged into the duodenum.