What are probiotics?

Probiotics are defined as living organisms, particularly specific strains of bacteria and yeasts, that confer health benefits to the host when consumed in adequate amounts. These microorganisms contribute to a balanced gut microbiota and have been associated with various health benefits, including improved digestion, enhanced immune function, and potential prevention of certain diseases.

The other options provide alternative concepts that can sometimes cause confusion. Non-digestible dietary fibers, for instance, are prebiotics that serve as food for probiotics but do not themselves have the health-promoting characteristics. Additionally, while many microorganisms exist in food, not all contribute health benefits; thus, the broad term does not capture the specific positive effects of probiotics. Lastly, the notion that probiotics are limited to yogurts and fermented products overlooks the fact that probiotics can exist in various other foods and supplements, extending beyond just these categories.