Optibac Probiotics for Every Day (Extra Strength) is a premium extra strength dose of 20 billion live microorganisms. Each capsule contains 20 billion live microorganisms. This supplement contains 5 billion live cultures of Lactobacillus acidophilus NCFM®, thought to be the most researched strain of acidophilus in the world. This product is ideal for anyone who feels the need for extra strength live cultures support. It is very important to drink plenty of water while on a course of live cultures. This product is vegetarian, vegan and has no added sugar. It is also free from gluten, yeast and soya.