VSL#3 made me a little worse, but this bifidobacterium supplement made me somewhat better. It's kinda strange, because VSL#3 contains: 450 billion (!) freeze dried lactic acid bacteria and bifidobacteria. Streptococcus thermophilus Bifidobacterium breve Bifidobacterium longum Bifidobacterium infantis Lactobacillus acidophilus Lactobacillus plantarum Lactobacillus paracasei Lactobacillus delbrueckii, subspecies bulgaricus But this other bifidobacterium supplement I have been taking made me somewhat better. It contains: 4,5 billion bacteria Lactobacillus acidophilus NCFM Lactobacillus paracasei lpc -37 Bifidobacterium lactis Bi-07 Bifidobacterium lactis Bi-04 It's not all that big of a difference. Except for the dosage. One equals 100 tablets of the other. Anyone else who's got somewhat worse from VSL#3?