What Does Jarro-Dophilus + FOS Powder Do? Jarro-Dophilus + FOS contains strains that help protect and maintain a balanced intestinal microflora, and support immune function and intestinal health. FOS is a natural prebiotic fiber that enhances the growth of beneficial bacteria in the intestinal tract. Minimum 12 billion viable cells at time of consumption, under recommended storage conditions and within Best Used Before date.
