October 22, 2025, Sioux Falls, SD: A new study published in Prostaglandins, Leukotrienes and Essential Fatty Acids (PLEFA) has shown an abundance of support for several health benefits tied to fish oil. This sweeping new review analyzed 34 UK Biobank studies and more than 60 health associations and found that fish oil supplement (FOS) use is generally beneficial, with 44 favorable associations and only one adverse health outcome.
These findings provide critical context to recent cautionary headlines about fish oil, offering a more balanced and data-based perspective.
Key Takeaways
- Widespread positive associations
Of the 60+ examined associations between fish oil use and health outcomes, 44 were significantly favorable, while just one was adverse—demonstrating that, overall, fish oil use correlates more often with constructive than harmful outcomes. - Biomarker data confirms biological effect
Separate analyses using objective omega-3 blood biomarkers found 11 significant positive health associations and no harmful ones—strengthening the case that these benefits derive from biological mechanisms, not simply from “healthy user bias.” - Implications for long-term health strategies
The cumulative evidence links higher omega-3 status (achieved through diet or supplementation) with lower risks of cardiovascular, inflammatory, metabolic, and neurodegenerative diseases. The review underscores the value of optimizing omega-3 status as part of a credible, science-based approach to lifelong health.
“This review helps clarify that fish oil isn’t the liability some headlines have painted it to be,” said Dr. Bill Harris, President of the Fatty Acid Research Institute. “With strong biomarker-backed data showing consistent cardiometabolic and neurological associations—and minimal adverse signals—there’s real reason to consider omega-3 status as a foundational piece of long-term wellness.”
About the Review
The article “A Review of the Relationships between Reported Fish Oil Supplement Use and Health Outcomes in the UK Biobank” aggregates results from 34 individual UK Biobank–based studies, assessing more than 60 health endpoints. The authors cross-referenced self-reported fish oil use with biomarker-based analyses to mitigate potential confounding factors and offer a more rigorous, integrative view of omega-3 effects.
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Study Link:
Media Inquiries:
Becky Wright
Marketing Communications Director, OmegaQuant
+1-201-675-0197
About OmegaQuant:
OmegaQuant is an independent, CLIA-certified lab that offers nutritional status testing to researchers, clinicians and the public. OmegaQuant performs analysis in Sioux Falls, SD, for commercial and academic research collaborators, and for consumers interested in monitoring their nutritional status in both blood and breast milk. Its goal is to offer the highest quality fatty acid analytical services to researchers and to provide simple tests of nutritional status to consumers, with the ultimate purpose of advancing the science and use of certain nutrients to improve health. Internationally, OmegaQuant works with the University of Stirling, based in the Scotland, to help process blood samples from Europe. Learn more @ www.omegaquant.com
About FARI:
FARI was established in 2020 as a non-profit foundation that brings together nutrition scientists and biostatistical experts with strong publication records and expertise in fatty acids to accelerate discovery of the relationship between fatty acids, especially omega-3s, and health. FARI is currently the only organization focused directly on discovering and publishing research evaluating the health effects of individual fatty acids. Learn more @ www.faresinst.org