Solgar® Advanced Multi-Billion Dophilus® Vegetable Capsules are a source of Lactobacillus acidophilus, Bifidobacterium lactis, Lactobacillus paracasei and Lactobacillus rhamnosus, beneficial microorganisms that provide friendly bacteria for the digestive system.* This product is formulated with the well-known LA-5®, BB-12®, L. CASEI 431® and LGG® strains and promotes the healthy functioning of the intestinal system.* Additionally, this product supports a healthy immune system.*