Eating fish: the impact on risk of depression

The Publication

A meta-analysis was conducted on links between fish consumption and depression. It considered 26 studies, of which 12 showed significant associations between low fish intake and depression.  The analysis showed that those who consumed the greatest amount of fish had a 17% decrease in symptoms, compared to those who consumed lower amounts. Given that the study included both cohort and cross-sectional studies, this could be a causal relationship; RCTs would be required to establish causality. Also questions remain about whether it is the fish oil that is beneficial, or the whole fish.  

Our Response

This study demonstrated an inverse association between fish consumption and depression, but leaves open the question of whether eating fish - and the specific type of fish and its preparation- conveys enhanced benefit or if the concentration offered in supplementation is more effective in certain circumstances.