Moss provide a higher concentration of this yeast probiotic at 500 mg of 10 billion CFUs. Our product is derived from non-GMO yeast and numerous clinical studies detail its efficacy at preventing and controlling antibiotic-associated microbial imbalances and its symptoms, specifically diarrhoea related to Clostridium difficile overgrowth. Often the two are related as a course of antibiotics can strip the healthy, balanced bacterial biome of the GI, leaving it prime for bacterial and fungal overgrowth. Moss Nutrition's Saccharomyces boulardii is also a strong overall probiotic that promotes optimal gastrointestinal health.