When nothing else seems to work, Renew Life Ultimate Flora Critical Care DOES! Ultimate Flora Critical Care’s blend of 50 Billion active cultures from 10 different strains in a ‘once a day’ serving helps ensure a healthy microbacterial environment in the intestinal tract. Ultimate Flora Critical Care contains therapeutic levels of both Lactobacilli and Bifidobacterium, making it the most complete and effective probiotic supplement on the market. Each capsule provides 50 Billion active cultures from 10 different strains in a ‘once a day’ serving (30 billion active cultures of Bifidobacterium and 20 billion active cultures of Lactobacilli and Lactococcus). Ultimate Flora Critical Care also contains FOS (fructooligosaccharides), which is an optimal food source for probiotics. FOS aids in the colonization of probiotics in the intestinal tract.