The Study
Habitual Dietary Intake of n-3 and n-6 Fatty Acids in Relation to Inflammatory Markers Among US Men and Women
This study looks at what people eat and their blood markers at one point in time. It can show if certain fats are linked to lower signs of inflammation, but it can't prove that eating those fats caused the change.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
This study looked at how eating certain fats, like those in fish or vegetable oils, affects inflammation in healthy people.
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 534 / 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 suggests that eating more fish oil may help reduce chronic inflammation, even if you eat a lot of seed oils.
- 2People who ate more fish oil (EPA and DHA) had lower levels of inflammation markers, especially if they also ate a lot of other common vegetable oils (n-6 fats).
- 3Plant-based omega-3 (ALA) and linoleic acid didn't change inflammation levels.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Circulation: Journal of the American Heart Association
Year
2003
Authors
T. Pischon, S. Hankinson, G. Hotamisligil, N. Rifai, W. Willett, E. Rimm
Related Content
Claims (4)
If healthy people in the U.S. regularly eat more foods rich in omega-3s like EPA and DHA—think fatty fish—their bodies tend to show lower levels of markers linked to chronic inflammation.
If you're a healthy American adult eating a lot of certain vegetable oil fats (n-6), getting more fish oil fats (EPA and DHA) seems to help reduce signs of inflammation in your body. But if you're not eating much of those vegetable oil fats, the fish oil doesn't make much difference.
Eating certain types of healthy fats—like those found in nuts and seeds—doesn’t seem to change levels of inflammation in the blood of healthy American adults.
Eating too much omega-6 fat—especially from vegetable oils and meat from grain-fed animals—might increase body-wide inflammation, which could lead to long-term health problems like heart disease or diabetes.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.