The role of fat in the body mainly includes providing energy, keeping warm, protecting internal organs, and participating in metabolism. 1. Providing energy: fat can provide essential fatty acids and energy. As fat can be stored in the body for a long time, in the case of hunger, the fat stored in the body will be decomposed to provide energy to the body, so that the body can maintain normal physiological functions. 2. Thermal insulation: fat in the process of releasing energy can release heat, when the body is in a cold environment, fat can play a certain role in insulation. 3. Protection of internal organs: fat is an important component of the human body, part of the fat mainly in the abdominal cavity, generally around the human organs, can play a role in supporting, stabilizing and protecting the internal organs. 4. Participate in metabolism: fat can assist the absorption of fat-soluble vitamins, so some of the metabolic process requires the participation of fat. However, it should be noted that too much fat accumulation, but will affect the metabolic activities. It is important to note that although fat should not be consumed in excess, it should also be avoided in insufficient supply, so as not to cause discomfort. It is recommended that the proportion of energy provided by fat in the daily diet should be 20%~30% of the total energy.