Prebiotics

Food for gut bacteria

What does Prebiotics do in your body?

Fibers like inulin and GOS that selectively feed beneficial gut microbes.

Which foods contain Prebiotics?

Onions, garlic, leeks, asparagus, bananas, legumes, chicory root.

Can you get too much Prebiotics?

Large amounts can cause gas and bloating, especially for people with IBS.

Evidence & sources

• A prebiotic is a substrate selectively used by host microorganisms conferring a health benefit. Evidence: established. Known: Expert consensus definition. Unknown: Benefits vary by product. Source: International Scientific Association for Probiotics and Prebiotics, Consensus statement on the definition and scope of prebiotics (2017).

Connected topics

• Fiber
• Gut Microbiome
• Probiotic Supplements
• Garlic & Onion
• Short-Chain Fatty Acids

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General education only, not medical advice. Drafted Oct 2026 · pending qualified expert review.