Types of dietary fiber
Referred to dietary fiber, the majority of people tend to think celery and leeks with a long fibrin, but do not know that the peas, jelly and jam without any visible fibrin also contain dietary fiber. Dietary fiber can be subdivided into soluble dietary fiber and insoluble dietary fiber.
Insoluble dietary fiber includes cellulose, hemicellulose, lignin, etc, which are mainly contained in stems, leaves and seeds of plant. It is the supporting structure of plants and the plants rely on it to maintain their shape. Wheat bran contains a lot of insoluble dietary fiber. Soluble dietary fiber includes pectin, gum, bean gum, algae gum, etc, which are mainly found in fruits, beans, oats, seeds and vegetables.
Function of dietary fiber
Dietary fiber can absorb water into the fibrin, so that their size become larger. Soluble fibrin can also spread in water to form high-viscosity solution. These characteristics of dietary fiber make them absorb water when through the intestinal tract to increase the volume of excrement and stimulate intestinal peristalsis to help excrete. With the intestinal peristalsis, the excretion of wastes will also take away some harmful substances in intestine to reduce the harm of these substances to our body. Soluble fiber can form a viscose substance to delay gastric emptying time, because mucus wrapped in the surface of the food hamper access of digestive enzymes with food, so the absorption speed of nutrients and starch will slow down in the small intestine  and it can reduce the extent of postprandial hyperglycemia to improve the status of high blood sugar and diabetes and help controling weight.