Saccharomyces cerevisiae subsp. boulardii is a probiotic yeast that maintains and balances the healthy gut microflora, preventing pathogens from colonizing. At the same time, it strengthens the innate immune system and restores normal bowel functions. The Ohly-Go® Boulardii strain used is extensively documented as a human probiotic. S. boulardii is applied for the treatment and prevention of gastrointestinal disorders, like neonatal diarrhea in piglets and calves. Its application is especially beneficial during times of stress.