Cited by 329Fatty Acid Research and HealthNutritional Studies and DietNuts composition and effects

α-Linolenic acid and risk of cardiovascular disease: a systematic review and meta-analysis

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Pan, An, Chen, Mu, Chowdhury, Rajiv, Wu, Jason HY, Sun, Qi, Campos, Hannia, Mozaffarian, Dariush, Hu, Frank B·2012·The American Journal of Clinical Nutrition

Abstract

Background Prior studies of α-linolenic acid (ALA), a plant-derived omega-3 (n-3) fatty acid, and cardiovascular disease (CVD) risk have generated inconsistent results.Objective We conducted a meta-analysis to summarize the evidence regarding the relation of ALA and CVD risk.Design We searched multiple electronic databases through January 2012 for studies that reported the association between ALA (assessed as dietary intake or as a biomarker in blood or adipose tissue) and CVD risk in prospective and retrospective studies. We pooled the multivariate-adjusted RRs comparing the top with the bottom tertile of ALA using random-effects meta-analysis, which allowed for between-study heterogeneity.Results Twenty-seven original studies were identified, including 251,049 individuals and 15,327 CVD events. The overall pooled RR was 0.86 (95% CI: 0.77, 0.97; I² = 71.3%). The association was significant in 13 comparisons that used dietary ALA as the exposure (pooled RR: 0.90; 95% CI: 0.81, 0.99; I² = 49.0%), with similar but nonsignificant trends in 17 comparisons in which ALA biomarkers were used as the exposure (pooled RR: 0.80; 95% CI: 0.63, 1.03; I² = 79.8%). An evaluation of mean participant age, study design (prospective compared with retrospective), exposure assessment (self-reported diet compared with biomarker), and outcome [fatal coronary heart disease (CHD), nonfatal CHD, total CHD, or stroke] showed that none were statistically significant sources of heterogeneity.Conclusions In observational studies, higher ALA exposure is associated with a moderately lower risk of CVD. The results were generally consistent for dietary and biomarker studies but were not statistically significant for biomarker studies. However, the high unexplained heterogeneity highlights the need for additional well-designed observational studies and large randomized clinical trials to evaluate the effects of ALA on CVD.

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  1. Schuurman AG, van den Brandt PA, Dorant E, Brants HA, Goldbohm RA. Association of energy and fat intake with prostate carcinoma risk: results from the Netherlands Cohort Study. Cancer 1999;86:1019-27.

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Authors
Pan, A., Chen, M., Chowdhury, R., Wu, J. H., Sun, Q., Campos, H., Mozaffarian, D., & Hu, F. B.
Affiliations
  • Harvard University (US)
  • Brigham and Women's Hospital (US)
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2012-12
Volume
96
Issue
6
Pages
1262-1273
ISSN
0002-9165 (ISSN-L)
OpenAlex
W2112093807
Cited by
329
References
63
Citations by year
2026: 10 · 2025: 21 · 2024: 13 · 2023: 15 · 2022: 28 · 2021: 31 · 2020: 35 · 2019: 20 · 2018: 25 · 2017: 22 · 2016: 31 · 2015: 25 · 2014: 30 · 2013: 20 · 2012: 1
FWCI
2.97
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • British Heart Foundation (RG/08/014/24067)
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (K99HL098459, HL-034594, R00HL098459, HL-088521, R01HL034594, R01HL088521)
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
  • Health Sciences › Nursing › Nutrition and Dietetics › Nuts composition and effects
Keywords
alpha-linolenic acid, omega-3 fatty acids, cardiovascular risk, dietary intake, coronary artery disease, stroke, observational studies, heterogeneity
MeSH terms
Cardiovascular Diseases, Diet, Humans, Risk, Reproducibility of Results, Biomarkers, alpha-Linolenic Acid

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