Article Synopsis

  • Nutritional psychiatry suggests that a healthy diet can impact depression and its symptoms, with studies indicating various mechanisms through which diet affects mental health.
  • These mechanisms are complex and involve multiple biological pathways, including inflammation, gut health, and brain function.
  • The field is still in its early stages, and further human studies are necessary to fully understand how diet influences mental health outcomes.

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Article Abstract

The field of nutritional psychiatry has generated observational and efficacy data supporting a role for healthy dietary patterns in depression onset and symptom management. To guide future clinical trials and targeted dietary therapies, this review provides an overview of what is currently known regarding underlying mechanisms of action by which diet may influence mental and brain health. The mechanisms of action associating diet with health outcomes are complex, multifaceted, interacting, and not restricted to any one biological pathway. Numerous pathways were identified through which diet could plausibly affect mental health. These include modulation of pathways involved in inflammation, oxidative stress, epigenetics, mitochondrial dysfunction, the gut microbiota, tryptophan-kynurenine metabolism, the HPA axis, neurogenesis and BDNF, epigenetics, and obesity. However, the nascent nature of the nutritional psychiatry field to date means that the existing literature identified in this review is largely comprised of preclinical animal studies. To fully identify and elucidate complex mechanisms of action, intervention studies that assess markers related to these pathways within clinically diagnosed human populations are needed.

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http://dx.doi.org/10.1038/s41380-020-00925-xDOI Listing

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