Source Naturals frutooligosaccharides (Fos) - a group of naturally occurring carbonhydrates which can help promote the growth of beneficial flora in the gastrointestinal tract. The body normally maintains a balance of friendly to unfriendly flora in the intestines unfortunately factors such as improper diet stress and use of antibiotics may disrupt this delicate balance. Scientific research has shown that fos serve as the food for friendly flora helping increase their numbers while they are not usable by harmful bacteria.Other products from HerbsPro