Randomised double-blind placebo-controlled trial of fish oil in the treatment of depression - PubMed (original) (raw)
Randomized Controlled Trial
Randomised double-blind placebo-controlled trial of fish oil in the treatment of depression
Karen M Silvers et al. Prostaglandins Leukot Essent Fatty Acids. 2005 Mar.
Abstract
Converging evidence suggests that omega-3 polyunsaturated fatty acids have aetiological importance in depression. To determine the effect of adding fish oil to existing therapy in participants who were being treated for depression in a community setting, 77 participants were randomly assigned to receive 8 g of either fish or olive oil per day in addition to their existing therapy. Fifty-nine (77%) participants completed 12 weeks of treatment. Dietary, biochemical and lifestyle factors were measured throughout the study. Mood was assessed using the Short Form Hamilton Depression Rating Scale (HDRS-SF) and the Beck Depression Inventory II. Sample size calculations were based on the HDRS-SF. Intention-to-treat and per protocol analyses were carried out using residual maximum likelihood. There was no evidence that fish oil improved mood when compared to the placebo oil, despite an increase in circulating omega-3 polyunsaturated fatty acids. However, mood improved significantly in both groups within the first 2 weeks of the study (P<0.001) and this improvement was sustained throughout. In conclusion, fish oil was no more effective than the control as an add-on therapy for depression in this setting.
Comment in
- Omega-3 and depression research: hold the olive oil.
Logan AC. Logan AC. Prostaglandins Leukot Essent Fatty Acids. 2005 Jun;72(6):441. doi: 10.1016/j.plefa.2005.02.006. Epub 2005 Apr 21. Prostaglandins Leukot Essent Fatty Acids. 2005. PMID: 15919612 No abstract available.
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