priors.science/reviews/omega-3-fatty-acids

Omega-3 Fatty Acids

The current evidence on 12 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.

12claims tracked
118primary papers reviewed
23 Oct 2026latest evidence review
1 Established · 3 Likely · 5 Uncertain · 2 Doubtful · 1 Refuted  |  four-reviewer panel · PICO Framework
ClaimStandingEvidence certaintyCorpus
Omega-3 lowers triglyceridesTGEstablished90%10
Icosapent ethyl cuts cardiovascular eventsCVLikely83%12
Docosahexaenoic acid raises low-density lipoprotein cholesterolTGLikely75%10
Omega-3 raises atrial fibrillation riskCVLikely74%7
Omega-3 in rheumatoid arthritisInflamUncertain60%9
Omega-3 for depressionNeuroUncertain55%11
Omega-3 reduces preterm birthPregUncertain55%10
Prenatal omega-3 and child brain developmentPregUncertain55%11
Omega-3 for dry eyeInflamLong-standingUncertain52%11
Omega-3 and cognitive declineNeuroDoubtful40%11
Omega-3 for childhood attention-deficit/hyperactivity disorderNeuroLong-standingDoubtful37%10
Omega-3 and cardiovascular mortalityCVRefuted22%10
Track Omega-3 Fatty Acids.
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.