2. Actually, this is a very serious matter. As mentioned above, if carbohydrate intake is insufficient, it will start to consume protein and fat in the body for productivity, resulting in unnecessary waste and adverse reactions such as acidosis. In severe cases, palpitations, dizziness, brain dysfunction, and even hypoglycemia coma may occur. Moreover, supplementing enough dietary fiber in the diet can not only meet the human body's demand for carbohydrates, but also effectively control appetite, reduce relative food intake and energy, which is conducive to weight control.
3. Supply energy. Carbohydrate is the main energy source in human body, and it is called three thermogenic nutrients together with protein and fat. Carbohydrates will be converted into glucose or other monosaccharides after being ingested into human body, which will be absorbed by cells and play a role in the body. According to research, each gram of carbohydrate can provide 16.8kj (about 4 kilocalories) of energy for human body.
4, constitute cells and tissue components, every cell in the human body has carbohydrates. Most of them exist in cells and various tissues in the form of glycoconjugates, which play a variety of roles, including helping cells recognize, acting as antigens, controlling cell membrane permeability, lubricating and so on.
5, detoxification, glucuronic acid in the liver can combine with some foreign compounds and toxins produced by bacteria. , and be excreted.
6, save protein, when carbohydrates as the main energy source is insufficient, in order to meet the body's energy needs, we have to decompose protein's ability. Therefore, in order to make the best use of amino acids to synthesize protein, we must ingest enough carbohydrates while ingesting protein.
7, to ensure the full oxidation of fat, when carbohydrates are insufficient, fat should be used for energy supply, but if fat is used too much, the ketone body, an intermediate product in its catabolism, can not be completely oxidized, which will cause acidosis.
8, the role of indigestible carbohydrates, the main source of indigestible carbohydrates is dietary fiber, which is absorbent and sticky in the human body, increasing the running speed in the intestine and reducing the time for harmful substances to contact the intestinal wall; Can be combined with cholic acid to reduce blood lipid, prevent gallstone formation, and prevent colon cancer.