Saccharomyces Boulardii is a probiotic yeast clinically shown to benefit individuals in  greater need for intestinal support, such as those who travel. MOS is a prebiotic that feeds the beneficial bacteria in the gut.

Enhanced Intestinal Protection
A Probiotic Yeast that Supports the Growth of Beneficial Bacteria in the Intestinal Tract
Probiotic Yeast + MOS (Prebiotic) Vegetarian Capsules
5 Billion CFU Per Capsule
Room-Temperature Stable
Vegan, Non-GMO, Gluten Free