1. Nutrients absorbed by the liver from the digestive tract, such as sugars, amino acids, fats and vitamins, are transformed, synthesized, decomposed and stored in the liver. For example, essential serum albumin, lipoproteins, glycoproteins and coagulation factors are synthesized in the liver and then transported to various tissues throughout the body. 2. The liver stores glycogen, which is broken down into glucose when hungry and released into the blood to maintain blood sugar levels. 3, the liver stores a variety of vitamins, such as vitamin B12 storage in the liver can be used for the body’s needs for a year. 4, the liver is also the most important organ of biological transformation, detoxification and defense, where the body produces harmful waste such as: ammonia, foreign food toxins and ingested drugs, all need to be transformed and detoxified by the liver, and then discharged from the body. Once an overdose of drugs exceeds the detoxification capacity of the liver, liver damage may result.