The liver is the largest digestive gland in the body and the center of metabolism in the body. It is estimated that there are more than 500 kinds of chemical reactions occurring in the liver. Specifically, the liver is mainly engaged in the following five kinds of “work”. 1, synthesis function: grains and cereals through the digestive tract hydrolyzed to glucose is transported to the liver, part of the liver stored as glycogen, for future use. Amino acids absorbed from the digestive tract are also used in the liver for protein synthesis, deamination, transamination and other functions. The liver is also the main synthesis place of many kinds 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 main detoxification organ of the human body, it can protect the body from damage. Certain metabolic wastes in the body or the corruption products of intestinal bacteria as well as the drugs taken, etc., are processed by the liver, and the toxic substances become five poisonous, less toxic or easily dissolved substances are discharged out of the body, and this process is detoxification.3, filtration function: Hormones are synthesized in the endocrine organs to regulate a variety of human body functions in minute quantities. Most hormones undergo chemical changes in the liver and are excreted. So when the liver disease is more serious, 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 and other storage and metabolism place. The liver also stores more iron than the blood. 5, produce bile: bile is a 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. Although the liver does so much for our health, it is a silent organ that never reports on its own accord, yet it is very important for us to understand what it does so that we can work with the liver’s workflow on our schedule and take care of it.