Isomaltooligosaccharide (Isomaltooligosaccharide) is a kind of starch sugar made from corn starch through a series of processes such as enzymatic conversion, refining and concentration. This product can promote the proliferation of bifidobacteria in human body and regulate the intestinal flora. Its water-soluble dietary fiber function can help to moisten the intestines and defecate. It also has the characteristics of low calorific value and anti caries. It is a widely used functional oligosaccharide.