Nowadays, people seem to be talking about fat discoloration, because it is reported that a large number of cardiovascular and cerebrovascular diseases, diabetes, obesity and cancer are related to excessive intake of fat. But we know that there are two types of fatty acids in fat that are essential nutrients for the human body. They are linoleic acid and alpha-linolenic acid. They play an irreplaceable role in the human body. First of all, they are important components of phospholipids, and phospholipids are important structural components of cell membranes, so essential fatty acids are directly related to the structure and function of cell membranes. Their lack can lead to changes in cell membrane structure and function, and increased membrane permeability and fragility. The specific manifestation is scaly dermatitis eczema. Secondly, they are involved in cholesterol metabolism. If essential fatty acids are lacking, it will cause cholesterol deposition in the body and lead to various diseases. At the same time, essential fatty acids are also the precursors for the synthesis of prostaglandins. If the synthesis of prostaglandins is blocked, the normal metabolism of the body will be greatly affected. At the same time, non-essential saturated fat can also provide some energy.
In addition, in terms of nutrition, fat can have the following functions:
First, it increases the feeling of satiety. When food fat enters the duodenum from the stomach, it can stimulate the production of gastrostatin, inhibiting intestinal motility and increasing gastric emptying time.
Second, improve the sensory properties of food. As an important raw material for food cooking and processing, fat can improve the color, aroma, taste and shape of food, achieve delicacies and stimulate appetite.
Third, provide fat-soluble vitamins. Food fat also contains various fat-soluble vitamins, such as vitamins A, D, E, K, etc. Fat is not only a source of these fat-soluble vitamins, but also promotes the absorption of these vitamins in the intestines.
Therefore, it is necessary to consume a certain amount of fat every day, especially essential fatty acids, which are mainly obtained from vegetable oils, nuts and fish.
