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Diet and Depression: Exploring the Biological Mechanisms of Action

Research output: Contribution to journalReview articlepeer-review

Wolfgang Marx, Melissa Lane, Meghan Hockey, Hajara Aslam, Michael Berk, Ken Walder, Alessandra Borsini, Joseph Firth, Carmine Pariante, Kirsten Berding, John F. Cryan, Gerard Clarke, Jeffrey M. Craig, Kuan-Pin Su, David Mischoulon, Fernando Gomez-Pinilla, Jane Foster, Patrice Cani, Sandrine Thuret, Heidi Staudacher & 6 more Almudena Sánchez-Villegas, Husnain Arshad, Tasnime Akbaraly, Adrienne O'Neil, Toby Segasby, Felice N. Jacka

Original languageEnglish
JournalMolecular Psychiatry
Accepted/In press2020
Published9 Oct 2020


  • Wolfgang et al., 2020

    Wolfgang_et_al._2020.pdf, 1.93 MB, application/pdf

    Uploaded date:03 Nov 2020

    Version:Final published version

King's Authors


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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