Inulin is a mixture of a class of natural fructans, derived from the inulin plant, inulin has many roles, such as can promote the synthesis of vitamins; can promote the absorption of minerals, can greatly improve the absorption of minerals such as Ca2+, Mg2+, Zn2+, Cu2+, Fe2+ "and so on; to improve the viscosity of the contents, reduce the speed of food from the stomach into the small intestine, thus reducing hunger, reducing food intake, preventing constipation and help obesity; to increase the viscosity of contents, lower food from the stomach into the small intestine The most prominent effect of inulin is to nourish intestinal probiotics. Inulin is not digested and absorbed, but directly into the large intestine to be utilized by bifidobacteria, producing acetate and lactate, which reduces the pH value of the large intestine, thus inhibiting the growth of harmful bacteria and promoting the proliferation of bifidobacteria and other probiotics.