FOS 
 FOS, also known as cane fruit oligosaccharides, from 1 to 3 fructosyltransferase by β (2-1) glycosidic bond of fructose and sucrose in the cane-binding generated three fruit sugar, cane sugar and cane fruit fruit four five sugar mixture. 100 grams of dry weight, about 60-70 grams of inulin of Jerusalem artichoke, inulin through the linear β-2, 1 - glycosidic chain fructan connection, the end of a sugar base. Therefore, the Jerusalem artichoke powder as raw material by enzyme hydrolysis of inulin, the availability of refining the final oligomeric fructose corn syrup. 
 FOS is a soluble dietary fiber, long-term use can lower cholesterol and improve lipid metabolism, the animal and human experimental evidence. Physiological function of fructooligosaccharides with the following: beneficial bacteria such as Bifidobacterium exploited, that is only the proliferation of 10 to 100 times, when bifidobacteria (bacteria), with two-way adjustment of the effect. Human intake of fructose, the body can inhibit the beneficial bacteria Bifidobacterium in the intestines of foreign pathogens and the inherent corruption, growth and reproduction of bacteria such as Salmonella, reduce intestinal growth and accumulation of material corruption, promote intestinal peristalsis, prevent constipation and diarrhea. FOS is a good source of soluble fiber, can effectively reduce serum cholesterol, triglycerides, free fatty acid number, for high blood lipids caused by high blood pressure, arteriosclerosis and other cardiovascular diseases have a better range of improvement. Fructo-oligosaccharides by bacterial fermentation in the large intestine produce L-lactic acid, can dissolve calcium, magnesium, iron and other minerals, the promotion of human absorption of minerals.