It's something that works Fiber will hinder the absorption of food. Fiber absorbs water and expands in the stomach, which can form a larger volume, make people feel full, help reduce food intake, and have a certain effect on weight control. People can digest and absorb food rich in fiber in a certain period of time, and then discharge waste. People who eat more fiber in their diet chew more often, so they eat more slowly. In this way, the small intestine can slowly absorb nutrients, and the blood sugar level is difficult to rise. Because dietary fiber can promote intestinal peristalsis, if eaten in large quantities, constipation will naturally decrease, and the incidence of colorectal cancer will also decrease. Therefore, obese people should eat more fiber.