The normal body fat rate is between 15%-18% for men and 25%-28% for women. Maintaining a normal body fat rate can maintain the endocrine balance of the human body and the normal metabolism and operation of the three major nutrients in the human body, namely sugar, protein and fat, to ensure that the human body is at a healthy level. Too high body fat rate will lead to the deposition of various fat factors in the blood in the blood vessel wall or human skin surface, resulting in obesity and various cardiovascular system diseases, such as hyperlipidemia and coronary artery sclerosis, resulting in thick human blood, which can easily lead to thrombosis and brain obstruction, and at the same time will lead to a decrease in the liver’s ability to metabolize fat factors, resulting in fatty liver, hepatitis, cirrhosis and other diseases. Low body fat rate will cause endocrine disorders in human body.