The Study
Dose–response relationship of dietary Omega-3 fatty acids on slowing phenotypic age acceleration: a cross-sectional study
This study looked at a bunch of people and found that those who ate more Omega-3s (like from fish) tended to have bodies that looked younger than their real age. But it didn’t make people change what they ate, so we don’t know if eating more Omega-3s actually made them younger-looking—or if people who were already healthier just happened to eat more Omega-3s.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
This study looked at whether eating more Omega-3s (like from fish) helps your body age more slowly, based on blood tests that estimate your real biological age.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 544 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This is like slowing aging by 3–4 months over 3 years — small but meaningful for long-term health.
- 2For every extra gram of Omega-3 eaten daily, biological aging slowed by 0.071 units.
- 3The benefit stopped increasing after eating about 1.1 grams per day.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Frontiers in Nutrition
Year
2024
Authors
Dongzhe Wu, Yishuai Jia, Yujia Liu, Mingyu Shang
Related Content
Claims (6)
Taking a daily omega-3 supplement might help your body age more slowly, making you biologically 3 to 4 months younger after three years compared to not taking it.
People with high blood pressure might benefit more from eating Omega-3s—like fish oil—because it could help them age more slowly compared to people with normal blood pressure.
Eating more than about 1.1 grams of Omega-3s a day doesn't slow down aging any more than that amount already does — after that point, extra Omega-3s don't help.
People who eat more Omega-3 fatty acids, like those found in fish, tend to age more slowly according to a biological age measure. For every extra gram of Omega-3 they eat daily, their biological age looks about 0.07 years younger than expected.
People who eat more Omega-3s, especially men and those over 60, seem to age more slowly based on a biological aging score. Men appear to benefit more even with smaller amounts of Omega-3s than women do.
People who eat more Omega-3s (like fish oil) seem to age more slowly, but this effect is stronger in Black and White adults than in Mexican American adults — suggesting that how Omega-3 affects aging might be different by ethnicity.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.