OptiBac Probiotics Saccharomyces boulardii is a supplement containing 5 billion pure live cultures. Offering you a natural option it\'s proven to survive through stomach acidity and reach the gut alive. Opti Bac Probiotics Saccharomyces Boulardii has been created especially for those seeking a natural option. It contains the internationally acclaimed strain of Saccharomyces boulardii in a pure supplement, with no additives or fillers. This well-researched and unique strain has been used safely around the world for over 50 years. Suggested for daily use, each capsule pr s 5 billion live microorganisms that will survive through stomach acidity and reach the gut alive. Features Saccharomyces boulardii is a well-researched, internationally acclaimed strain, proven to survive through stomach acidity to reach the gut alive. 5 billion live cultures per capsule, guaranteed until end of expiry. Friendly yeast, more robust to environmental stressors than common bacterial live cultures, and especially stable and resistant to heat and humidity. No refrigeration required, contrary to some other live cultures supplements. Used safely for over 50 years, suitable for vegans and vegetarians, and certified gluten free for those with coeliac disease or an intolerance. Vegan, Gluten Free, Dairy Free.