Acidophilus original ensures 5 billion CFUs per capsule2 strain Lactobacillus formula (rhamnosus acidophilus) specifiy designed to meet the needs for ages 12 up the true tee of PrimadophilusThe Primadophilus brand is backed by an unparalleled true tee that ensures consistent purity, potency and intestinal delivery. This 3 part tee includes: true potency the potency of CFUs claimed on the label is fully teed until expiration, not just at time of manufacturetrue releasedelayed release ensures stomach acid survival and intestinal delivery true identifying the protic strains listed on the label make their way into a Primadophilus product