what is inulin fos
1. Fructo-oligosaccharides (FOS) and inulin are types of fructo-polysaccharides, comprised of -(glucose-fructose)- subunits. The only difference between FOS and inulin is polymer chain length. Inulin/FOS also goes by the name of Neosugar, Alant Starch, Atlanta Starch, Alantin, Dahlin, Helenin, and Diabetic Sugar.Inulin tastes sweet, and it cannot be digested by humans, and it is soluble (unlike cellulose).nulin/FOS is a soluble fiber that is quickly and easily fermented. The difference between cellulose (a food we are adapted to) and Inulin/FOS (a food we are not adapted to) is like the difference between a slow burning ember and a raging fire.