Solgar Advanced Multi-Billion Dophilus Vegetable Capsules are a source of L. acidophilus, B. lactis, L. paracasei and L. rhamnosus, beneficial microorganisms that help maintain a healthy intestinal flora.* This product is formulated with the well known strains LA-5, BB-12, L. casei 431 and LGG and promotes the healthy functioning of the intestinal system.*