Since 1947 Enhanced Series 1.5 Billion Microorganisms Per Serving Refrigeration Optional 100% Dairy, Lactose and Milk Free (No Casein) Suitable for Vegetarians Dietary Supplement Solgar Advanced 40+ Acidophilus Vegetable Capsules are a source of beneficial microorganisms L. acidophilus, L. rhamnosus, L. paracasei, B. lactis and S. thermophilus. This product is formulated with the well-known strains LA-5, LGG, L. casei 431, BB-12 and TH-4, helping to maintain a healthy intestinal flora.