We use superior science to make smarter formulas like Jarrow Formulas® Saccharomyces Boulardii + MOS (mannaoligosaccharide), an oligosaccharide from the cell walls of S.cerevisiae. It helps protect and maintain intestinal microflora and restore normal intestinal microflora when possible disruptions occur, such as during travel.* *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. ††Ratings based on results of the 2021 ConsumerLab Survey of Supplement Users.