Saccharomyces boulardii is most commonly used for treating and preventing diarrhoea, including infectious types such as rotaviral diarrhoea in children, diarrhoea caused by gastrointestinal (GI) take-over (overgrowth) by \"bad\" bacteria in adults, traveler\'s diarrhoea, and diarrhea associated with tube feedings. It is also used to prevent and treat diarrhoea 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. This has been well researched and used safely across the world for the last 50 years. Suitable for vegetarians and vegans.