Blood Omega-3 and Omega-6 Levels Linked to Personality Changes Over 10 Years
This study followed 452 adults living in Israeli kibbutz communities, measuring red blood cell fatty acid levels and personality traits (hostility and “type-A” behavior) at the start of the study and again 8 to 10 years later.
Researchers found that people with higher total omega-6 fatty acid levels at the start of the study tended to show lower type-A personality scores a decade later, even after accounting for their initial personality levels. A similar trend was seen for hostility scores, though this result was borderline in statistical significance.
When the researchers also accounted for genetic influences on personality (which explained about a third of the variation), both higher total omega-3 and higher total omega-6 levels were linked to lower hostility and type-A scores, suggesting these associations may be at least partly independent of inherited traits.
What this means for you
This long-term observational study suggests a possible link between blood fatty acid levels and personality traits associated with cardiovascular risk, but it cannot prove that fatty acids cause these personality changes. The findings point to an interesting area for future research rather than a reason to change behavior based on this study alone.
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The American journal of clinical nutrition · 2026-07-02 · DOI: 10.1016/j.ajcnut.2026.101426
Read the original source ↗This summary is for educational purposes only and is not medical advice. Always talk to your healthcare provider before making changes to your supplement routine.