priors.science/reviews/dietary-fibre

Dietary Fibre

The current evidence on 10 claims, ordered from most established to most contested. Each score is the panel’s evidence certainty: how firmly the literature supports the claim as stated.

10claims tracked
183primary papers reviewed
23 Oct 2026latest evidence review
2 Established · 7 Likely · 1 Uncertain · 0 Doubtful  |  four-reviewer panel · PICO Framework
ClaimStandingEvidence certaintyCorpus
Soluble fibre lowers LDL cholesterolCardiometabolicEstablished88%20
Fermentable fibre boosts short-chain fatty acidsGastrointestinalEstablished87%22
Fibre aids satiety and weight lossSystemicLong-standingLikely80%20
Fibre improves constipationGastrointestinalLong-standingLikely75%21
Fibre lowers cardiovascular disease riskCardiometabolicLikely74%29
Fibre lowers type 2 diabetes riskCardiometabolicLikely72%21
Fibre lowers colorectal cancer riskGastrointestinalLikely72%24
Fibre lowers C-reactive proteinSystemicLikely72%29
Fibre lowers blood pressureCardiometabolicLikely71%20
Fibre lowers all-cause mortalitySystemicUncertain68%28
Track Dietary Fibre.
These claims are re-checked against new research as it is published. Track this topic for the full review, including each claim’s challenge and the papers behind it.
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Standing: what the evidence certainty means
Established≥ 85%Strong, consistent evidence. Unlikely to change.
Likely70–84%Well supported, with some gaps or indirect evidence.
Uncertain50–69%Mixed or limited evidence. Genuinely open.
Doubtful30–49%Little support; the weight of evidence leans against it.
Refuted< 30%The evidence contradicts it. Confidently false as stated.
A standing changes only when the score moves past a boundary by more than 4 points, the re-scoring noise floor; a score within 4 points of a boundary keeps its previous standing.
Where the evidence sits in time
Long-standingMost of this evidence is older than the rest of this field.