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What Is the Role of Dietary Inflammation in Severe Mental Illness? A Review of Observational and Experimental Findings

Firth, J; Veronese, N; Cotter, J; Shivappa, N; Hebert, J; Ee, C; Smith, L; ... Sarris, J; + view all (2019) What Is the Role of Dietary Inflammation in Severe Mental Illness? A Review of Observational and Experimental Findings. Frontiers in Psychiatry , 10 , Article 350. 10.3389/fpsyt.2019.00350. Green open access

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Abstract

Severe mental illnesses (SMI), including major depressive disorder, bipolar disorder, and schizophrenia, are associated with increased inflammation. Given diet’s role in modulating inflammatory processes, excessive calorie-dense, nutrient-deficient processed food intake may contribute toward the heightened inflammation observed in SMI. This review assesses the evidence from observational and experimental studies to investigate how diet may affect physical and mental health outcomes in SMI through inflammation-related pathways. Cross-sectional studies indicate that individuals with SMI, particularly schizophrenia, consume more pro-inflammatory foods and fewer anti-inflammatory nutrients than the general population. Cohort studies indicate that high levels of dietary inflammation are associated with increased risk of developing depression, but there is currently a lack of evidence for schizophrenia or bipolar disorder. Randomized controlled trials show that dietary interventions improve symptoms of depression, but none have tested the extent to which these benefits are due to changes in inflammation. This review summarizes evidence on dietary inflammation in SMI, explores the directionality of these links, and discusses the potential use of targeted nutritional interventions for improving psychological well-being and physical health outcomes in SMI. Establishing the extent to which diet explains elevated levels of inflammatory markers observed in SMI is a priority for future research.

Type: Article
Title: What Is the Role of Dietary Inflammation in Severe Mental Illness? A Review of Observational and Experimental Findings
Open access status: An open access version is available from UCL Discovery
DOI: 10.3389/fpsyt.2019.00350
Publisher version: https://doi.org/10.3389/fpsyt.2019.00350
Language: English
Additional information: Copyright © 2019 Firth, Veronese, Cotter, Shivappa, Hebert, Ee, Smith, Stubbs, Jackson and Sarris. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (http://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Keywords: nutrition, schizophrenia, bipolar disorder, nutrients, vitamin
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health > Behavioural Science and Health
URI: https://discovery.ucl.ac.uk/id/eprint/10074003
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