Pure Encapsulations Saccharomyces boulardii 60sPure Encapsulations Saccharomyces boulardii (active probiotic culture) offers support for intestines, urinary tract, alertness and the stomach. Saccharomyces boulardii is a type of yeast strain that helps balance and colonize your gastrointestinal tract with beneficial microflora. Its commonly referred to as a probiotic. Not only can it help with facilitating digestion, it also serves to inhibit the growth of other, more harmful forms of bacteria.