Dietary fiber is a kind of non-starch polysaccharide in carbohydrates, which mainly includes cellulose, hemicellulose, pectin and lignin. Because dietary fiber plays an extremely important role in chronic diseases, such as preventing constipation, obesity, diabetes, cardiovascular diseases and cancer. Cereal food is the main source of dietary fiber, but the content of dietary fiber in cereal food is greatly influenced by the degree of food processing. Dietary fiber mainly exists in the skin of grain. The higher the degree of processing, the less dietary fiber food contains.
Cellulose is a kind of carbohydrate, and the cellulose in food is called dietary fiber, which is generally classified as insoluble dietary fiber. Soluble dietary fiber includes pectin, colloid and part of hemicellulose, which affects the absorption of glucose and lipids by small intestine. Insoluble fibers include cellulose, insoluble hemicellulose and lignin, as well as resistant starch and indigestible oligosaccharides.
Dietary fiber can increase the volume of excreta, stimulate the peristalsis of large intestine, add garbage toxin to eliminate it, and prevent constipation and intestinal cancer; At the same time, the soluble dietary fiber contained in brown rice, oats and soybeans also has the functions of lowering blood fat, cholesterol and blood sugar. When you consume a lot of fiber, you must replenish enough water, otherwise it will block the intestine and cause constipation. So don't consume more than 70 grams of fiber every day. There are basically two kinds of dietary fiber, one is soluble and insoluble dietary fiber, and soluble dietary fiber refers to pectin, gum and other dietary fibers contained in fruits, oats, beans and other foods.