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Exploring the Impact of Flavonoids on Symptoms of Depression: A Systematic Review and Meta-Analysis.


ABSTRACT: Recent evidence suggests that diet modifies key biological factors associated with the development of depression. It has been suggested that this could be due to the high flavonoid content commonly found in many plant foods, beverages and dietary supplements. Our aim was to conduct a systematic review to evaluate the effects of dietary flavonoids on the symptoms of depression. A total of 46 studies met the eligibility criteria. Of these, 36 were intervention trials and 10 were observational studies. A meta-analysis of 36 clinical trials involving a total of 2788 participants was performed. The results showed a statistically significant effect of flavonoids on depressive symptoms (mean difference = -1.65; 95% C.I., -2.54, -0.77; p < 0.01). Five of the 10 observational studies included in the systematic review reported significant results, suggesting that a higher flavonoid intake may improve symptoms of depression. Further studies are urgently required to elucidate whether causal and mechanistic links exist, along with substantiation of functional brain changes associated with flavonoid consumption.

SUBMITTER: Ali S 

PROVIDER: S-EPMC8615051 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature

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Exploring the Impact of Flavonoids on Symptoms of Depression: A Systematic Review and Meta-Analysis.

Ali Sawan S   Corbi Graziamaria G   Maes Michael M   Scapagnini Giovanni G   Davinelli Sergio S  

Antioxidants (Basel, Switzerland) 20211020 11


Recent evidence suggests that diet modifies key biological factors associated with the development of depression. It has been suggested that this could be due to the high flavonoid content commonly found in many plant foods, beverages and dietary supplements. Our aim was to conduct a systematic review to evaluate the effects of dietary flavonoids on the symptoms of depression. A total of 46 studies met the eligibility criteria. Of these, 36 were intervention trials and 10 were observational stud  ...[more]

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