Probiotic 50B provides 50 billion CFU of the beneficial bacteria Lactobacillus acidophilus, Lactobacillus rhamnosus, Lactobacillus plantarum, Bifidobacterium longum and Bifidobacterium lactis in acid-resistant capsules with pH targeted release to deliver maximal viable organisms to the digestive tract. These five researched strains promote healthy intestinal ecology to support gastrointestinal and immune health. Clinical studies indicate that lactobacilli and bifidobacteria supplementation supports intestinal epithelial integrity and healthy immune response.