Natures Way - Fortify Optima Digestive 50 Billion - 30 Veggie Capsules - NPN: 80050736 -- Probiotics are good bacteria that help support gastrointestinal health. Nature's Way Fortify Optima Digestive Balance is formulated with 4 bifidobacteria strains and 2 lactobacillus strains. It contains researched strains NCFM, Bl-04, Bi-07 and La-14. Fortify Optima's 50 billion potency of live probiotic cultures is guaranteed until product expiration date when stored under recommended conditions. Nature's Way Fortify Optima Digestive Balance Probiotic is vegetarian and contains 6 probiotic strains.