The crude fiber food is: wheat bran, grain: 4- 10%, arranged from more to less as wheat grain, barley, corn, buckwheat flour, coix seed flour, sorghum rice and black rice. The cellulose content of potatoes such as potatoes and sweet potatoes is about 3%. Beans: the content is 6- 15%, and the order from more to less is soybean, green bean, broad bean, kidney bean, pea, black bean, adzuki bean and mung bean. Generally speaking, the finer the processing, the less the cellulose content. Vegetables: the content of bamboo shoots is the highest, the cellulose content of dried bamboo shoots reaches 30-40%, and the pepper exceeds 40%. The rest contain more cellulose: bracken, cauliflower, spinach, pumpkin, Chinese cabbage and rape. Fungi (dry): the cellulose content is the highest, among which the cellulose content of Tricholoma matsutake is close to 50%, and more than 30% are in the order of Nostoc flagelliforme, Lentinus edodes, Tremella fuciformis and Auricularia auricula. In addition, the cellulose content of laver is also high, reaching 20%. Nuts: 3- 14%. /kloc-more than 0/0% are: black sesame, pine nuts and almonds; Below 10% are white sesame, walnut, hazelnut, walnut, sunflower seed, watermelon seed and peanut kernel. Fruit: Dried red fruits are the most abundant, and the cellulose content is close to 50%, followed by dried mulberry, cherry, wild jujube, black jujube, jujube, pomegranate, apple and pear.

The so-called crude fiber is what we usually call dietary fiber. It is a kind of non-starch polysaccharide in carbohydrates, which mainly comes from plant cell walls. Dietary fiber is difficult to be digested and absorbed by human body, and most of it tastes rough, so it was called crude fiber in early nutrition. Foods containing dietary fiber mainly include grains, vegetables, fruits and beans. Among them, it is divided into soluble dietary fiber and insoluble dietary fiber. The former is gum, gum and mucilage, which are soluble in water and mainly exist in fruits, oats, barley and some beans. Most dietary fibers are insoluble, such as cellulose and hemicellulose. Most crude fiber foods in the market are added with coarse grains and miscellaneous grains containing this kind of insoluble dietary fiber, such as corn, wheat bran, rice bran and so on.