Since 1947 Enhanced Series 500 Million Microorganisms Per Serving Refrigeration Optional 100% Dairy, Lactose and Milk Free (Contains No Casein) Suitable for Vegetarians Dietary Supplement Solgar's Advanced Acidophilus Vegetable Capsules are a source of L. acidophilus, a beneficial microorganism that naturally resides in the lower digestive tract. This product is formulated with the well-known strain LA-5, helping to maintain a healthy intestinal flora