Primadophilus Original Ensures 5 Billion Cfus Per Capsule. 2 Strain Lactobacillus Formula (Rhamnosus & Acidophilus) Specifically Designed To Meet The Needs For Ages 12 & Up. The True Guarantee of Primadophilus: The Primadophilus Brand is Backed By An Unparalleled True Guarantee That Ensures Consistent Purity, Potency And intestinal Delivery. This 3 Part Guarantee includes: True Potency: The Potency of Cfus Claimed On The Label is Fully Guaranteed Until Expiration, Not Just At Time of Manufacture. True Release: Delayed Release Ensures Stomach Acid Survival And intestinal Delivery. True Identity: Only The Probiotic Strains Listed On The Label Make Their Way into A Primadophilus Product.