Saccharomyces cerevisiae ssp. boulardii (SB) is a beneficial probiotic yeast that helps to maintain gastrointestinal function and integrity by supporting a healthy gut microbial profile; by increasing the production of secretory IgA (sIgA), short-chain fatty acids (SCFAs) and helping to promote the activity of brush border disaccharide enzymes. SB has demonstrated efficacy in relieving diarrhoea severity and duration in both adults and children due to various triggers. SB assists in supporting healthy immune function and may help to reduce inflammatory mediators in the gastrointestinal tract.