Human metabolism refers to the fact that after ingesting external substances, a person is converted into energy in the body under the action of enzymes to provide energy for the normal functioning of the body, and then the remaining substances are discharged from the body. Metabolism is the normal physiological activity of the human body, consisting of two processes: anabolism and dissimilation. The human body needs a certain amount of energy to maintain the nutrients required by the body for normal functioning. Food enters the body after digestion through the gastrointestinal tract, through the enzyme into the nutrients that the body can absorb, this process is anabolic also called anabolic. The body’s own material decomposition after the release of energy, while the decomposition of the waste generated by the process of discharge, called heterogeneity is also catabolism, after 20 years of age, the human body’s metabolism gradually slowed down, the need to use the outside world to help the human body to speed up the metabolism.