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Prebiotic Fiber

Low concern

Generally well tolerated but may cause GI discomfort (gas, bloating) at higher doses; non-specific umbrella label hides specific fiber type.

Found in

393 products

What it is

Umbrella term for non-digestible fibers (e.g., inulin, FOS, GOS) that selectively stimulate beneficial gut bacteria growth.

Functional fiber ingredient marketed for digestive/gut microbiome health.

Why it's flagged

May cause GI side effects (gas, bloating) at higher doses

What regulators actually say

"FDA reviewed scientific evidence on isolated and synthetic non-digestible carbohydrates and recognized specific fibers (including inulin) as dietary fiber."

FDA — fda.gov

Regulatory status

United States — FDA

Several fibers (inulin, GOS) are recognized as dietary fiber by FDA per 2016 review

European Union — EFSA

Various prebiotic fibers permitted; some have authorized health claims

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