Probiotic 50B provides 50 billion CFU per capsule of the beneficial bacteria Lactobacillus acidophilus, Lactobacillus rhamnosus, Lactobacillus plantarum, Lactobacillus gasseri, Bifidobacterium longum subsp. Longum, Bifidobacterium bifidum and Bifidobacterium animalis subsp. lactis. This formula is offered in acid-resistant capsules with pH-targeted release for maximal probiotic viability. These capsules are designed to resist disintegration in an acidic environment (i.e. stomach) and dissolve in more alkaline environments (i.e. small and large intestine). This technology helps to protect the organisms from stomach acid, delivering the maximal viable organisms to the G.I. tract. This blend of lactobacilli and bifidobacteria is designed to promote healthy intestinal ecology to support gastrointestinal health. Probiotics have been shown to maintain healthy G.I. barrier function, in part by supporting intestinal epithelial integrity. Several trials have also revealed that mixed probiotic supplementation helps maintain intestinal flora and promote G.I. comfort.