<P> Probiotics are being studied for their potential to influence inflammatory bowel disease . There is some evidence to support their use in conjunction with standard medications in treating ulcerative colitis and no evidence of their efficacy in treating Crohn's disease . </P> <P> A live formulation of lyophilized Bifidobacterium breve, Bifidobacterium longum, Bifidobacterium infantis, Lactobacillus acidophilus, Lactobacillus plantarum, Lactobacillus paracasei, Lactobacillus bulgaricus, and Streptococcus thermophilus (VSL #3) has shown effectiveness in the small clinical trials, some of which were not randomized nor double - blinded, that had been done as of 2015; more high - quality clinical trials are needed to determine safety and effectiveness . </P> <P> Probiotics are under study for their potential to affect irritable bowel syndrome, although uncertainty remains around which type of probiotic works best, and around the size of possible effect . </P> <P> Ingestion of certain active strains may help lactose - intolerant individuals tolerate more lactose than they would otherwise have tolerated . </P>

Where do they get the bacteria for probiotics