Synerbio Saccharomyces Boulardii is an expert formulation of this well-researched yeast, plus four strains of friendly bacteria and added prebiotics. Ideal to take after a course of antibiotics. 100% active ingredients formulated by expert nutritionists. The non-pathogenic yeast Saccharomyces boulardii was first discovered by French microbiologist Henri Boulard in 1920 on the skin of lychee fruit. Considered an ideal supplement to take alongside antibiotics and when traveling abroad, this remarkable yeast is one of the great success stories in probiotic therapy. Synerbio Saccharomyces boulardii Veg Caps also includes five strains of lactobacilli and bifidobacteria, as well as prebiotics. The exclusive FS2-60 Prebiotic offers full-spectrum prebiotic oligosaccharides and plant-based inulin. FS2-60 is not digested, but is used by friendly flora to increase the colonization of lactobacilli and bifidobacteria while reducing the foothold of hostile species. The human intestine is home to an immense population of bacteria, estimated at 39 trillion microbial cells that include bacteria, viruses and fungi. Due to the large size and importance of gut bacteria, this microbial population can be seen as a bacterial organ, the size of your liver and just as important. How to use Take one to two capsules twice a day. For travel, take one capsule daily, five days before departure and continue during travel.