XOS English name: Xylo-oligosaccharide shorthand: XOS XOS oligosaccharides, also known as wood, is composed of 2-7 xylose molecules β (1-4) glycosidic bond formed by the polymerization of functional sugar. Sheng Yuan is a high efficiency. XOS has good physical and chemical properties and physiological effects, sweetness equivalent to 40% sucrose, sugar is white or slightly yellow powder. No visible impurities, this product has a unique odor, no smell. First, the four characteristics of a highly selective proliferation of bifidobacteria efficacy is 10 - 20 times that of other polymeric carbohydrates, easily digested and absorbed directly into the large intestine bifidobacteria priority for the use and proliferation of beneficial bacteria in the human body, and inhibit other harmful bacteria to breed, breed. 2, it is difficult for the human digestive system digestive enzyme test with saliva, gastric, pancreatic and intestinal conducted by the decomposition shows that almost all kinds of digestive juices can not break down XOS, its energy is almost zero, will not affect blood glucose levels, but also does not increase blood glucose in insulin levels, and will not form fatty deposits. Particularly suitable for consumption in patients with diabetes, obesity, high blood pressure. 3, acid, thermal stability and good acidic conditions (pH = 2.5-8) was heated to 100 ℃ substantially not decomposed, can cover the majority of the pH of the food system. 4, the intake of the effective dose is less effective daily intake of 0.7-1.4g. Two important functions: 1, reducing the toxic and harmful bacteria fermentation products produced enzymes. 2, the proliferation of beneficial bacteria in the body, inhibit pathogens, improve constipation and diarrhea. 3, to promote calcium, iron absorption, improve retention. 4, lower serum cholesterol, reduce blood pressure. 5, protect the liver function. 6, can enhance immunity. 7, does not cause dental caries, inhibit oral bacteria breeding. 8, can cause the body to produce a variety of nutrients, including B vitamins, niacin and folic acid. XOS promote calcium mechanisms: 1, gastrointestinal tract: the selective microbial fermentation of the colon, short-chain fatty acid concentration increased, reduce intestinal PH, and ultimately increase the solubilization of minerals. 2 intestinal crypt aspects: intestinal crypt height, number, caecal blood flow increase per crypt epithelial cells, ultimately mucosa - serosa calcium (calcium channel passive diffusion) also increases. 3, the cell: the calcium-binding protein D9k increased expression levels, thus activating the calcium diffusion channel. Six, XOS and laxative constipation: If fecal retention in the intestine for too long, resulting in fecal moisture is absorbed by the intestine too, become too dry and hard, difficult to discharge, namely constipation. XOS: XOS coordination probiotics, to improve the human micro-environment, bacteria produce acids in the growth process. First: reducing overall intestinal PH value, inhibit the growth of harmful bacteria, inhibit intestinal corruption matter, improve constipation; Second: to stimulate intestinal peristalsis, increased fecal moisture and maintain a certain osmotic pressure, thus improving constipation.