Causal Relationship of Polyunsaturated Fatty Acids With Mental Disorders: A Systematic Review and Meta-analysis.
Nutr RevSep 6, 2026
Clinical ResearchPsychiatry
Yiying Yao, Xiaopeng Yang, Junwei Yan et al.
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In 30 seconds
This systematic review and meta-analysis utilized Mendelian randomization to explore the causal relationship between polyunsaturated fatty acids (PUFAs) and mental disorders (MDs) using genome-wide association study data. The analysis found that genetically predicted omega-3 levels were linked to a reduced risk of several MDs, including major depressive disorder and schizophrenia, while a high omega-6 to omega-3 ratio was associated with increased depression risk.
Key findings
- Genetically predicted omega-3 was causally linked to reduced risk of major depressive disorder and schizophrenia.
- Omega-3 percentage exhibited protective effects against emotional personality disorder.
- A high omega-6 to omega-3 ratio was associated with increased risk of depression and mood disorders.
Why it matters
Understanding the relationship between dietary fatty acids and mental health can inform nutritional interventions aimed at preventing or managing mental disorders, potentially improving patient outcomes.