The calories of oat bran are much less than those of oats, but the content of nutrients per unit weight is several times that of oats. Oat bran contains the most dietary fiber in oats, especially the most abundant β-glucan, which is a soluble dietary fiber. Oat fiber is known as "noble dietary fiber" because it is an effective component to reduce blood fat and contribute to intestinal health.

Oats (Latin scientific name: Avena sativa? L) Gramineae, which is called Bromus and Wild Wheat in Compendium of Materia Medica. Oat is not easy to peel, so it is called skin oat, which is a food with low sugar, high nutrition and high energy. Oats are sweet and flat. Can benefit the spleen, nourish the heart and stop sweating. It has high nutritional value. Can be used for patients with spontaneous sweating due to physical weakness, night sweats or pulmonary tuberculosis. Fried clothes in soup, or "peeling steamed noodles to make cakes." Oats are cold-tolerant, drought-tolerant, adaptable to soil and self-propagating. Oats are rich in dietary fiber, which can promote gastrointestinal peristalsis, facilitate defecation, have low calories, low glycemic index, and reduce blood fat and blood sugar. Oats are also one of the advanced supplements and indispensable dry food in poor areas.

Oats belong to minor grains, and there are mainly two kinds, one is skin oats and the other is naked oats. Naked oats have no shell when they are ripe, which is commonly known as oil wheat, that is, naked oats. Most domestic oats are of this kind. Peeled oats have shells when they are ripe, such as imported Australian oats.

In China, oat (naked oat) is one of the main alpine crops, and it is a first-class miscellaneous grain. Concentrated in Bashang and other alpine regions, it belongs to Gramineae and Panicum. Its growth period is roughly the same as that of wheat, but it has strong adaptability, cold tolerance, drought tolerance and sunshine. China is one of the cradles of oats, and Wuchuan County of Inner Mongolia is one of the cradles of oats in the world.

Known as the "hometown of oats" in China. It has been recorded in ancient books. It is called Mi in Erya Cao Shi, Pang in Historical Records and Biography of Sima Xiangru, and Bromus in Tang Herbal Medicine. Compendium of Materia Medica says: "Oats are mostly wild, so they are named after bird food". In addition, it is recorded in ancient books such as Disaster Relief Materia Medica and Agricultural Administration.