Protein, sugar and fat are three important substances to maintain the normal function of the body, but also the body’s most important source of energy. 1g of fat combustion produces 9.0 kcal, while 1g of sugar and protein combustion produces 4.0 kcal, so in the intake of food, the fat calorie production is the highest, in the times of scarcity of material supply, the intake of fat to supply energy is very economical and effective. For those who are obese and need to lose weight, they should minimize the intake of high-fat foods. High-fat foods mainly include a variety of animal meat, especially fat meat, animal offal, such as large intestine, and usually eat the oil, including vegetable oil, cream, etc. are high-fat, high-calorie food, long-term consumption is easy to cause overweight, elevated blood lipids, aggravate atherosclerosis and so on.