The effects of dietary fiber include laxative, increase satiety, accelerate cholesterol metabolism. 1. Laxative: dietary fiber has a strong water-absorbing capacity, can play a role in softening the role of stool, through the intestinal tract will be more smooth and effortless, to accelerate the excretion of stool. 2. Increase satiety, decomposition of fat: dietary fiber will expand after absorbing water, thereby increasing the human body’s sense of fullness. Dietary fiber has the function of combining with part of the fatty acid, when the fatty acid through the digestive tract can not be absorbed, thus reducing the absorption rate of fat. 3 Accelerate cholesterol metabolism:Dietary fiber can be combined with bile acids to promote the rapid discharge of bile acids from the body. When bile acid discharge speed up, cholesterol to bile acid conversion speed will also be accelerated. Although dietary fiber is good, but also need to moderate, excessive consumption will lead to nutrient absorption disorder.