Primadophilus Children is an easy-to-mix powder formulated especially for little ones. It contains 3 billion CFUs and 7 strain formula specifically designed for children with NutraFlora scFOS -- the preferred probiotic food source. Exclusively backed by True Guarantee: The potency of CFUs claimed on the label is fully guaranteed until expiration, not just at time of manufacture and only the probiotic strains listed on the label make their way into a Primadophilus product.