Fat consists of three elements, C, H and O, and its chemical formula is C3H5(OOCR) 3. Its functions are as follows: fat is a good energy storage substance in cells, which mainly provides heat energy; Protect internal organs and maintain body temperature; Assist the absorption of fat-soluble vitamins; Participate in metabolic activities in all aspects of the body and so on.

Fatty acids are divided into three categories: saturated fatty acids, monounsaturated fatty acids and polyunsaturated fatty acids. Fat is soluble in most organic solvents, but insoluble in water.

Fat is a triacylglyceride composed of glycerol and fatty acids, in which the molecule of glycerol is relatively simple, but the types and lengths of fatty acids are different. Therefore, the nature and characteristics of fat mainly depend on fatty acids, and the types and contents of fatty acids contained in fat in different foods are different.

Fat is the energy provider of organisms. Lipids are also important components of organisms, such as phospholipids, which are important components of biofilm, and oils are the storage and transportation forms of fuel needed for metabolism. Lipid substances can also provide essential fatty acids and fat-soluble vitamins dissolved in animals.

Lipid substances on the surface of organisms have protective effects such as preventing mechanical damage and heat emission. As the surface substance of cells, lipids are closely related to cell recognition, species specificity and tissue immunity.

Extended data

High-fat food:

Vegetable oils: peanut oil, rapeseed oil, soybean oil, sunflower oil, safflower oil, linseed oil, perilla oil and fish oil.

2. Fat meat and animal offal food: Although it contains a certain amount of high-quality protein, vitamins and minerals, fat meat and animal offal food contain a lot of saturated fat and cholesterol, which have been identified as the two most important dietary factors leading to heart disease. It is now clear that long-term consumption of animal viscera foods will greatly increase the risk of cardiovascular diseases and malignant tumors (such as colon cancer and breast cancer).

3, fried food: this kind of food is high in calories, contains high oil and oxidizing substances, and it is easy to cause obesity if eaten frequently; It is the most dangerous food leading to hyperlipidemia and coronary heart disease.

4. Nuts such as walnuts, almonds, peanuts and cassia seeds, beans such as soybeans, adzuki beans and black beans, and some grains such as corn, sorghum, rice, adzuki beans and millet. ?

5. Instant noodles: It is a food with high salt, high fat, low vitamins and low minerals. On the one hand, due to the high salt content, the renal load increases, which will increase blood pressure; On the other hand, it contains a certain amount of artificial fat (trans fatty acids), which has a considerable negative impact on the cardiovascular system.

References:

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