What is the role of probiotics and prebiotics in gut health?

• A. Probiotics introduce beneficial bacteria; prebiotics nourish gut microbiota.
• B. Probiotics are fibers that feed gut bacteria.
• C. Probiotics are medications that kill harmful bacteria.
• D. Probiotics and prebiotics do not affect gut health.

Answer: (A)

Probiotics are live microorganisms that, when consumed in adequate amounts, help balance the gut by introducing beneficial bacteria. Prebiotics are nondigestible fibers that the gut microbes feed on, nourishing and promoting the growth and activity of those beneficial bacteria. Together they support a healthier gut environment by enhancing gut barrier function, boosting production of short-chain fatty acids that nourish colon cells, and helping regulate immune responses. The idea that probiotics add helpful bacteria and prebiotics feed them captures the core idea behind their role in gut health. The other statements don’t fit because probiotics aren’t simply fibers, prebiotics aren’t antimicrobial drugs, and these nutrients do influence gut health.