Omega-3 review found a small improvement in cognitive test scores
A review found modest gains on a cognitive test, while dose and duration analyses left the best regimen unresolved.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review found a small average improvement on the MMSE cognitive test with omega-3 supplementation. That result does not establish prevention of dementia or a noticeable improvement in daily functioning. Analyses did not find significant associations between dose or treatment duration and cognitive outcomes, leaving an optimal regimen unresolved.
The abstract does not specify comparison treatments, supplementation durations or whether score changes mattered in daily life. Results varied moderately across studies, and this abstract-based summary cannot assess the underlying trials in detail.
What researchers found
MMSE cognitive test scores
The pooled analysis favored omega-3 supplementation, with a statistically significant difference. Comparison treatments and follow-up times were not specified.
What the result measures
The review combined earlier systematic reviews of supplementation and cognitive testing. Its central outcome was performance on the MMSE test; a small pooled gain does not by itself show a noticeable change in everyday abilities.
What dose analyses leave open
The authors suggest a threshold effect but do not identify a cutoff amount or duration. Failing to detect an association with dose or duration does not prove that different regimens have equal effects.
The original publication
Omega-3 Polyunsaturated Fatty Acids and Cognitive Decline in Adults with Non-Dementia or Mild Cognitive Impairment: An Overview of Systematic Reviews.
Barros MI, Brandão T, Irving SC et al.
Nutrients · 2025
- PubMed ID
- 41010527
- Record checked
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