Evidence map›Paper›PMID 40075437›Full record

SynthesisJournal of translational medicine2025

Dietary and circulating omega-6 fatty acids and their impact on cardiovascular disease, cancer risk, and mortality: a global meta-analysis of 150 cohorts and meta-regression.

Reza Sadeghi, Mostafa Norouzzadeh, Minoo HasanRashedi, Sanaz Jamshidi, Hamid Ahmadirad, Mahdi Alemrajabi, Mohammadreza Vafa, Farshad Teymoori

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Journal of translational medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Review
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Reza Sadeghi *Nutritional Sciences Research Center, Iran University of Medical Sciences, Tehran, Iran.
Mostafa Norouzzadeh *Nutritional Sciences Research Center, Iran University of Medical Sciences, Tehran, Iran.
Minoo HasanRashediNutritional Sciences Research Center, Iran University of Medical Sciences, Tehran, Iran.
Sanaz JamshidiImam Ali Hospital, Shiraz University of Medical Sciences, Kazerun, Iran.
Hamid AhmadiradNutritional Sciences Department, School of Nutrition Sciences and Food Technology, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Mahdi AlemrajabiGastrointestinal and Liver Diseases Research Center, Iran University of Medical Sciences, Tehran, Iran.
Mohammadreza VafaNutritional Sciences Research Center, Iran University of Medical Sciences, Tehran, Iran. rezavafa@yahoo.com.
Farshad TeymooriNutritional Sciences Research Center, Iran University of Medical Sciences, Tehran, Iran. teymoori.f68@gmail.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDespite the significant increase in omega-6 fatty acid consumption, evidence regarding their health impacts remains inconsistent. This study performs an umbrella review and updated meta-analysis to evaluate the association between dietary and circulating omega-6 levels and the risks of cardiovascular diseases (CVDs), cancer, and mortality.

methodsA systematic search was conducted in PubMed, Scopus, and Web of Science until January 2024 to identify eligible meta-analyses of prospective observational studies. The Cochrane risk of bias and GRADE tools were used to assess the risk of bias and certainty of the evidence, respectively.

resultsAnalysis of 150 publications revealed that higher dietary intake and circulating levels of omega-6 were associated with lower risks of CVDs, cancer incidence, and all-cause mortality in the general population, particularly for coronary heart disease and stroke. While omega-6 intake was linked to lower risks of lung and prostate cancers, it was associated with higher risks of ovarian and endometrial cancers. Subgroup analyses revealed that these protective associations were more pronounced in cohort studies and absent in populations with pre-existing health conditions.

conclusionsHigher dietary intake and circulating levels of omega-6 fatty acids were associated with lower risks of CVDs, cancers, and all-cause mortality. However, the associations vary by cancer type and are less evident in individuals with pre-existing health conditions. These findings highlight the potential benefits of omega-6 fatty acids for public health while underscoring the need for further research to address specific risks and underlying mechanisms.

trial registrationRegistration number (PROSPERO): CRD42024522842.

Indexed as

Cardiovascular DiseasesDietFatty Acids, Omega-6NeoplasmsCohort StudiesHumansRegression AnalysisRisk FactorsFatty Acids, Omega-6Cardiovascular diseasesFatty acidsLinoleic acidMeta-analysisMortalityNeoplasms

Identifiers

PMID40075437
PMCPMC11899657

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.