Saccharomyces boulardii is a probiotic yeast that survives stomach acid and colonizes the intestinal tract.* It promotes the health of the intestinal tract, helps to encourage a healthy gut flora balance, and supports a balanced intestinal response to normal internal and environmental stressors.* Saccharomyces boulardii has also been shown to support proper gastrointestinal function during temporary disruptions to the normal balance of gut flora.* Natural color variation may occur in this product.