Viridian Synbiotic Saccharomyces Boulardii Veg Caps is an expert formulation comprising good gut bacteria (commonly known as probiotics) with added ‘prebiotics’. The non-pathogenic yeast Saccharomyces boulardii was first discovered by French microbiologist, Henri Boulard in 1920 in the skin of Lychee fruit. Considered an ideal supplement to take alongside antibiotics and when travelling overseas. This remarkable yeast is one of the great success stories in probiotic therapy. Vegan.