Since 1947 Enhanced Series 5 Billion Microorganisms Per Serving Refrigeration Optional 100% Dairy, Lactose and Milk Free (Contains No Casein) Suitable for Vegetarians Dietary SupplementSolgar's Advanced Multi-Billion Dophilus Vegetable Capsules are a source of L. acidophilus, B. lactis, L. paracasei and L. rhamnosus GG, 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.