Saccharomyces boulardii is most commonly used for treating and preventing diarrhea, including infectious types such as rotaviral diarrhea in children, diarrhea caused by gastrointestinal (GI) take-over (overgrowth) by \"bad\" bacteria in adults, traveler\'s diarrhea, and diarrhea associated with tube feedings. It is also used to prevent and treat diarrhea caused by the use of antibiotics. Some studies also show that taking Saccharomyces boulardii by mouth could potentially help improve the appearance of acne. OptiBac Probiotics Saccharomyces Boulardii provides 5 billion live cultures guaranteed per capsule. It does not interfere with medicines or supplement for Candida, IBS or diarrhoea. Well researched and used safely across the world for the last 50 years. Suitable for vegetarians and vegans.