Probiotics are live microorganisms that provide health benefits to the host whether they come in fermented food or dried in capsule form. They belong to bacteria from the genera Lactobacillus, Bifidobacterium or Bacillus. In addition to bacteria, probiotics are also found among yeasts from the genus Saccharomyces. Saccharommyces boulardii is a yeast that is intensively researched in terms of probiotic properties, and according to the latest molecular research, taxonomists classify it as Saccharomyces cerevisiae, although their properties are completely different. According to some authors, it is a variety of the mentioned species. Saccharommyces boulardii shows therapeutic properties in diarrhea caused by the action of antibiotics, the presence of Clostridium difficile, the appearance of irritable colon, in people suffering from AIDS, etc. In addition, this yeast has potential for the food industry, the production of dairy products, non-alcoholic and alcoholic beverages (especially beer and wines), and can also be used as a protective culture to prevent food spoilage caused by molds.