With Clinically Documented Strains 3 Billion per Gram Probiotic SupplementNew with GOSBaby"s Jarro-Dophilus contains superior, scientifically documented strains. Clinical studies have documented the benefit of B. breve M-16V and B. longum BB536 in infants and young children. GOS (GalactoOligoSaccharides) is similar to the oligosaccharides found in human milk. Both GOS and FOS (FructoOligoSaccharides) enhance the colonization of beneficial intestinal flora such as Bifidobacteria. Each gram (approximately 1/4 teaspoon) contains a minimum of 3 billion probiotic organisms.