Saccharomyces cerevisiae var. boulardii (S. boulardii)

Probiotic yeast typically refers to Saccharomyces cerevisiae var. boulardii, a live, non-pathogenic yeast strain well-studied for its ability to protect and restore gut microbiota, inhibit harmful pathogens, regulate immune responses, and promote intestinal health. It is classified taxonomically as a member of the yeast kingdom, specifically the genus Saccharomyces and the species S. cerevisiae (with boulardii as a variant/strain). Its use as a probiotic is mainly in gastrointestinal disorders; it is not a molecular target but functions as a living therapeutic microorganism. While clinical studies support its safety and efficacy for most populations, caution is advised in immunocompromised individuals due to risk of systemic infection.

Other names

Saccharomyces boulardiiS. boulardiiSaccharomyces cerevisiae var. boulardiiprobiotic Saccharomycesprobiotic yeast

Competitive exclusion of pathogenic microbes; Neutralization of bacterial toxins; Production of bioactive metabolites with antimicrobial properties; Enhancement of mucin and barrier protective mechanisms; Immunomodulation by stimulating cytokine and immunoglobulin production.