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.*