BB536 refers to Bifidobacterium longum BB536, a patented strain of Morinaga Dairy Co., Ltd., a well-known Japanese enterprise. 65438-0969, Senyong Dairy first isolated Bifidobacterium longum BB536 from breast-fed healthy infants. It is a kind of beneficial bacteria, which naturally inhabits human intestines. It has been discovered and safely used for half a century, and is called one of the most thoroughly studied probiotic strains in the world. Bifidobacterium longum has been listed in the list of food bacteria published by the Ministry of Health of China. BB536 has been officially certified by the US Food and Drug Administration (FDA), and is recognized as safe and suitable for various foods and dietary supplements (GRN 000268). Up to now, 150 documents have shown that BB536 is one of the mature multifunctional probiotic strains with clinical efficacy, and it has curative effects in clinical fields such as intestinal health, immunity, infection and allergy.