Lipids are important substances in the body's energy storage and energy supply and are also important structural components of biofilms. Lipid metabolism is an important and complex biochemical reaction in the body. It refers to the digestion and absorption and synthesis and decomposition processes that is helped by various related enzymes. The processes produce substances that are needed by the body to ensure the normal operation of physiological functions. Diseases caused by abnormal lipid metabolism are common in modern society.