Fiber food refers to food with high dietary fiber content (the content is 2%-20%). Dietary fiber is resistant to digestive enzymes in the intestines, but can be decomposed by bacterial enzymes. Dietary fiber is divided into two types: insoluble and soluble Class, insoluble dietary fiber includes cellulose, hemicellulose and lignin, and soluble dietary fiber includes pectin, algin, bean gum and Shugusi. Most dietary fiber is carbohydrates that cannot be digested by the intestines and stomach, but it can promote intestinal peristalsis and help the intestines and stomach digest and absorb other nutrients.