No Refrigeration. Clinically Studied Probiotic. Probiotic + Prebiotic. Enhanced Intestinal Protection. Gluten Free. Probiotics Supplement. Igenâ„¢ Non-GMO Tested. 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. Non-Dairy Room Temperature Stable. MannanOligoSaccharides Provides Enhanced Support to the Intestinal Tract. Gluten Free Probiotic.