Probiotics, "Bifidobacterium", are a natural part of the bacterial flora in the human body and have a symbiotic bacteria-host relationship with humans. Infact we are mostly bacterium. Water, protein, fat, minerals, and bacteria all make that beautiful body you use everyday as a vessel of life conscious experience. B. longum promotes good digestion, boosts the immune system, and produces lactic and acetic acid that controls intestinal pH. These bacteria also inhibit the growth of Candida albicans, E. coli, and a others. Bifidobacteria are considered as important probiotics and used in the food industry to relieve and treat many intestinal disorders. Bifidobacteria exert a range of beneficial health effects, including the regulation of intestinal microbial homeostasis, the inhibition of pathogens and harmful bacteria that colonize and/or infect the gut mucosa, the modulation of local and systemic immune responses, the repression of procarcinogenic enzymatic activities within the microbiota, the production of vitamins, and the bioconversion of a number of dietary compounds into bioactive molecules. These bifidobacterium ferment sugars to produce lactic acid within our intestines. The B. longum genome codes for many proteins specialized for the catabolism of oligosaccharides. This bacterium also is able to digest "nondigestible" plant polymers or host-derived glycoproteins and glycoconjugates giving it the ability to compete with other gastrointestinal bacteria and occupy a large percentage in the bacterial flora department.