Fructo-oligosaccharides is a probiotic proliferating agent that is not digested and absorbed by the human body, but directly reaches the large intestine and rapidly proliferates Bifidobacterium in the intestine. It can not only improve the intestinal flora, but also inhibit the rise of blood sugar, promote the absorption of microelements, inhibit the growth of harmful bacteria, and improve immunity. Fructo-oligosaccharides has been proved to be the only natural ingredient with the biphysiological properties of both super strong bifidum factor and water-soluble dietary fiber, which has been recognized by more than 200 countries and regions worldwide.