My Balance Probiotic 40 billion is a blend of 4 strains of bacteria (40 billion CFU/g) of Probiotic Bacteria.   Lactobacillus acidophilus, Bifidobacterium lactis, Lactobacillus plantarum, and Lactobacillus paracasei. It also contains extra ingredients in marine polysaccharide complex and fructooligosaccharide. My Balance Probiotics is designed to provide a high potency and balance of beneficial bacteria. By taking it on a regular basis Probiotic-40 can help assist in maintaining healthy intestinal flora. This supplement also contains FOS to help with acidophilus and bifidus.  Lactobacillus acidophilus These bacteria are one of the most common probiotics and can be found in yogurt and other fermented foods.