First of all, it is the oligomerization of calories. The calories contained in fructose can't be directly digested and absorbed by the body, but can be absorbed and utilized by intestinal bacteria. Eating fructooligosaccharides often won't cause the body to gain weight, but indirectly has the effect of losing weight, burning the accumulated fat in the body and achieving the effect of losing weight. It is also possible to take fructooligosaccharides for diabetic patients. Secondly, fructooligosaccharides can selectively proliferate beneficial bacteria in the intestine, so that the beneficial bacteria in the intestine can reach a balanced state, inhibit the growth of harmful bacteria, reduce the stay of toxic substances in the intestine, and have obvious protective effects on intestinal mucosa and cells. Finally, it can reduce the content of cholesterol and triglyceride in serum. Fructooligosaccharides can reduce the intake of fat, thus reducing the content of cholesterol in blood and cholesterol in the body. What is introduced above is the function, efficacy and function of fructooligosaccharides. Some people also take systematic fructose to promote the absorption of nutrients, especially calcium, and effectively prevent diseases caused by calcium deficiency in the body.