Research
Mixed
Specific types of dietary fiber (e.g., resistant starch, inulin, beta-glucan) differentially alter gut microbiota composition, with some promoting beneficial SCFA-producing bacteria while others have minimal or no effect.
Vary your fiber sources to support a diverse gut microbiota. Include resistant starch (cooled potatoes/rice), inulin (chicory root, garlic), and beta-glucan (oats). Different fibers feed different bacteria, so diversity in fiber sources promotes a more resilient and functional microbiome.
GoodQualifiesHIGH confidence
It is clear that dietary fibre has a profound effect on the composition of the gut microbiota, with the degradation of different types of fibre requiring numerous different species that encode complementary enzymes for fermentation.
Why this rating
The paper cites multiple studies showing specific fiber-microbiota interactions, providing strong evidence for differential effects.
Source
Dietary Fibre Modulates the Gut Microbiota
Peter Cronin et al. · Nutrients · 2021
DOI 10.3390/nu13051655
narrative_reviewCited 620×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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