The effects of oat bran are usually as follows: 1, can promote intestinal mechanical peristalsis, which can promote defecation, reduce the area and time of contact between harmful substances in the colon and intestinal mucosa, and thus the role in preventing constipation and reducing the chance of colorectal cancer is very obvious; 2, can slow down the rate of absorption of carbohydrates, that is, sugar, for the control of increased blood sugar, the prevention of diabetes is very obvious; 3, can increase the sense of satiety, which can avoid the intake of other excessive food, in the prevention and control of overweight, obesity is also very obvious.