双歧杆菌属(Bifidobacterium)是人体肠道正常菌丛之一。该菌对人体的健康有益,具有抑制肠道腐败菌、改善便秘与腹泻,促进蛋白质消化、产生多种维生素,控制内毒素血症,提高宿主对放射线的耐受性及抗癌能力。现已证明乳酮糖是促进双歧杆菌增殖的有利因子。为此加入乳酮糖的食品在国外相当盛行,种类也相当繁多,有饮料、糖果、婴儿食品、特种 Bifidobacterium is one of the normal gut flora in the human body. The bacteria is beneficial to the health of the human body and has the functions of inhibiting intestinal spoilage bacteria, improving constipation and diarrhea, promoting protein digestion, producing multiple vitamins, controlling endotoxemia, improving host’s tolerance to radiation and anticancer ability. It has been demonstrated that lactulose is a favorable factor for promoting the proliferation of Bifidobacteria. To this end, the food containing lactulose is quite popular in foreign countries, and the species is quite diverse. There are drinks, confectionery, baby food, specialty