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Probiotic Support for Healthy Intestinal Microflora and G.I. FunctionNon-GMO & HypoallergenicDietary SupplementCertified Gluten-Free by the Gluten-Free Certification OrganizationSaccharomyces boulardii is a probiotic yeast. It nutritionally supports the gastrointestinal tract by maintaining healthy gut flora balance.Each allergen-free capsule contains 5 billion CFU (colony forming units). This formula helps to maintain a healthy balance of intestinal flora.