Mei Lin: Prebiotics & Probiotics—Start With Definitions, Then Evidence

Mei Lin, PhD, CNS
Nutrition Scientist (sample profile)

The question parents ask

What is the difference between a prebiotic and a probiotic, and how should families think about supplement claims?

What established pediatric guidance says

HealthyChildren describes probiotics as beneficial microorganisms and prebiotics as compounds—often complex carbohydrates—that help nourish beneficial gut bacteria. Its pediatric guidance also recommends talking with a child's pediatrician before using probiotic or prebiotic supplements and emphasizes that supplement use should be considered in context rather than assumed to be universally necessary.

Sample professional perspective

“The first step is precision. Prebiotics and probiotics are not interchangeable terms, and evidence should be interpreted for the specific ingredient, product and intended use rather than generalized into a broad promise.”

What this means when evaluating a supplement

• Know whether the product contains a prebiotic, probiotic or both.
• Look for clear ingredient identification and serving information.
• Be cautious with broad claims that go beyond the evidence for the specific product.
• Discuss use with the child's pediatrician, particularly when a child has medical conditions or is taking medications.

Educational sample content only. This page is not medical advice and does not replace care from your child's pediatrician. The linked HealthyChildren article is an independent AAP resource; its inclusion does not imply endorsement of DocVites.