Dietary fiber, as an essential nutrient of maintaining human health, has important physiological effects. It has won a reputation of “a cleaner of intestinal canal”

　　1)The property of swelling in water can help to increase the volume of chime, stimulate the gastrointestinal tract to wriggle, soften excrement, prevent constipation, promote defecation, increase the times of defecation, take cathartic effect, reduce the staying time of excrement in intestinal tract and the contact between the harmful substance in excrement and intestinal tract, maintain intestinal tract clean, and reduce & prevent gastrointestinal diseases.

　　2) Dietary fiber can restrain the absorption of cholesterol.

　　3)Dietary fiber can postpone and reduce the absorption of harmful substances including heavy metals and reduce & prevent the toxic effect of harmful chemicals.

　　4)Dietary fiber can improve the intestinal flora, maintain the microecological balance in the human body and improve the composition of some nutrients.

　　5)Water soluble dietary fiber has strong property of swelling in water. It swells with water absorbing. The volume and weight can increase by 10-15 times. Therefore, it can increase a sense of satiety, reduce the absorption of adipose in food, reduce the heat ratio of adipose in food, control and reduce the total energy of food, avoid the excessive heat energy and accumulated adipose in the human body, have a sense of satiety and lose weight.

　　6)According to the scientific research, soluble dietary fiber has great effects on controlling the rapid increase of postprandial blood sugar and improving glucose tolerance. Dietary fiber can postpone the absorption of glucose, delay the digestion of digestible saccharides including starch and avoid the rapid increase of postprandial blood sugar. Dietary fiber with insulin sensitivity can influence the cell function of pancreas islet a, improve the regulating function of insulin in blood, promote glucose tolerance of the human body.