Nourex Professional SB Probiotics contains the good bacteria Saccharomyces Cerevisiae (Boulardii), supporting friendly bacteria in the gastrointestinal tract and helps relieve diarrhoea and digestive discomfort. Nourex Professional SB Probiotics contains the good bacteria Saccharomyces Cerevisiae (Boulardii), supporting friendly bacteria in the gastrointestinal tract and helps relieve diarrhoea and digestive discomfort. Made in Australia.