BLast reviewed
Omega-3: what the largest trial did and did not show
Omega-3s are essential nutrients with well-established roles. Outcome trials in the general population are mixed, so we grade B, not A.
Editorial section. Research summaries are not product claims and contain no product links or offers. A summary is never proof that any product works.
- The question
- What does high-quality evidence say about marine omega-3 supplements in healthy adults?
- Study design
- VITAL: randomized, placebo-controlled trial of 25,871 US adults, median follow-up 5.3 years, 1 g/day marine omega-3. [1][2]
- What they found
- The trial did not find a reduction in its primary composite endpoints versus placebo. We publish this null result because honest evidence matters more than a tidy story. Omega-3 intake from food is low for many adults, and EPA and DHA are structural parts of cell membranes in the heart, brain and eyes. [1][2]
- Limitations
- One dose (1 g/day) was tested. Results may differ at higher EPA doses or in people with low fish intake.
- What this does not mean
- This does not mean omega-3s are useless, and it does not mean a supplement prevents any disease.
- Sources
- Manson JE et al. N Engl J Med. 2019;380:23-32. doi.org/10.1056/NEJMoa1811403
- NIH Office of Dietary Supplements: Omega-3 Fatty Acids fact sheet. ods.od.nih.gov/factsheets/Omega3FattyAcids-HealthProfessional/
Where it is discussed on podcasts
Verified episodes. Hosts and guests do not endorse Everstack. Podcast index
- Huberman Lab: Dr. Rhonda Patrick: Micronutrients for Health & Longevity (2022-05-02)
- FoundMyFitness: #068 Dr. Bill Harris on the Omega-3 Index: Increasing Omega-3 to Promote Longevity & Transform Health (2021-09-10)
- FoundMyFitness: #083 How Vitamin D, Omega-3s, & Exercise May Increase Longevity | Dr. Rhonda Patrick (2023-11-10)
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