Cited by 107Fatty Acid Research and HealthNutritional Studies and DietAquaculture Nutrition and Growth

Use of supplemental long-chain omega-3 fatty acids and risk for cardiac death: An updated meta-analysis and review of research gaps

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Maki, Kevin C., Palacios, Orsolya M., Bell, Marjorie, Toth, Peter P.·2017·Journal of Clinical Lipidology

Abstract

Background Randomized controlled trials (RCTs) assessing use of long-chain omega-3 polyunsaturated fatty acids (LC-OM3), primarily eicosapentaenoic acid, and/or docosahexaenoic acid have shown mixed results. Objective The objectives of the study were to update and further explore the available RCT data regarding LC-OM3 supplementation and risk for cardiac death and to propose testable hypotheses for the mixed results obtained in RCTs regarding supplemental LC-OM3 use and cardiac risk. Methods A literature search was conducted using PubMed and Ovid/MEDLINE for RCTs assessing LC-OM3 supplements or pharmaceuticals with intervention periods of at least 6 months and reporting on the outcome of cardiac death. Meta-analysis was used to compare cumulative frequencies of cardiac death events between the LC-OM3 and control groups, including sensitivity and subset analyses. Results Fourteen RCTs were identified for the primary analysis (71,899 subjects). In the LC-OM3 arms, 1613 cardiac deaths were recorded (4.48% of subjects), compared with 1746 cardiac deaths in the control groups (4.87% of subjects). The pooled relative risk estimate showed an 8.0% (95% confidence interval 1.6%, 13.9%, P = .015) lower risk in the LC-OM3 arms vs controls. Subset analyses showed numerically larger effects (12.9%–29.1% lower risks, all P < .05) in subsets of RCTs with eicosapentaenoic acid + docosahexaenoic acid dosages >1 g/d and higher risk samples (secondary prevention, baseline mean or median triglycerides ≥150 mg/dL, low-density lipoprotein cholesterol ≥130 mg/dL, statin use <40% of subjects). Heterogeneity was low (I 2 ≤ 15.5%, P > .05) for the primary and subset analyses. Conclusion LC-OM3 supplementation is associated with a modest reduction in cardiac death.

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  • A few meta-analyses found a statistically significant CVD risk reduction, but more results showed insufficient evidence of a possible protective effect.

    “A few meta‐analyses found a statistically significant CVD risk reduction, 30 , 31 but more results showed insufficient evidence of a possible protective effect. 32 , 33 , 34 , 35 , 36 , 37”

    From Association Between Omega-3 Fatty Acid Intake and Dyslipidemia: A Continuous Dose-Response Meta-Analysis of Randomized Controlled Trials (2023) · cites this paper as [31]

    The Results report a statistically significant 8.0% lower risk of cardiac death with supplemental long-chain omega-3 fatty acids in the primary meta-analysis. This supports the sentence’s significant-reduction finding, but only for cardiac death, not CVD risk broadly. The sentence assigns the insufficient-evidence finding to other citations. (LLM, conf=0.83)

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  1. Trikalinos TA, Lee J, Moorthy D, et al. Effects of Eicosapentanoic Acid and Docosahexanoic Acid on Mortality Across Diverse Settings: Sys- tematic Review and Meta-Analysis of Randomized Trials and Prospec- tive Cohorts. , Vol. 4Rockville MD: Nutritional Research Series; 2012.

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Authors
Maki, K. C., Palacios, O. M., Bell, M., & Toth, P. P.
Affiliations
  • MB Clinical Research and Consulting (United States) (US)
  • Johns Hopkins University (US)
Corresponding author
Maki, Kevin C.
Venue
Journal of Clinical Lipidology
Publisher
Elsevier BV
Published
2017-09
Volume
11
Issue
5
Pages
1152-1160.e2
ISSN
  • 1876-4789 (ISSN-L)
  • 1933-2874
OpenAlex
W2741070947
Cited by
107
References
61
Citations by year
2026: 4 · 2025: 6 · 2024: 6 · 2023: 8 · 2022: 5 · 2021: 18 · 2020: 14 · 2019: 18 · 2018: 18 · 2017: 7 · 2014: 2
FWCI
1.60
Type
journal article
Language
en
Open access
Locations
  • Journal of clinical lipidology (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Aquaculture Nutrition and Growth
Keywords
n-3 long-chain polyunsaturated fatty acids, eicosapentaenoic acid, docosahexaenoic acid, omega-3 supplementation, cardiovascular mortality, cardiovascular risk, secondary prevention, triglycerides, LDL cholesterol, statin use, dose-response relationship
MeSH terms
Death, Humans, Risk, Fatty Acids, Omega-3, Randomized Controlled Trials as Topic, Dietary Supplements

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