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Previous studies had suggested an association between omega-3 levels and behaviour and mood disorders, including depression, according to background information in the review article, published in the journal Drug and Therapeutics Bulletin.

Omega-3 fatty acids play a role in chemical signalling in the brain, and also help regulate blood vessel activity and immune system function linked to the central nervous system. Oily fish, nuts, seeds, and leafy green vegetables are the main dietary sources of omega-3, which is also available in dietary supplements that contain fish oil.

The review authors analysed published studies on the clinical effectiveness of omega-3 in people with depression.

This means that people should not exceed the maximum recommended doses of these supplements, the authors said. They also noted that pregnant women should take only low doses of fish oil supplements, which contain vitamin A. High levels of vitamin A can harm a developing foetus. – (HealthDayNews)

February 2007
 

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