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The gut microbiome and child and adolescent depression and anxiety: a systematic review and meta-analysis with youth consultation
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The gut microbiome and child and adolescent depression and anxiety: a systematic review and meta-analysis with youth consultation
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Journal Article
The gut microbiome and child and adolescent depression and anxiety: a systematic review and meta-analysis with youth consultation
2025
Overview
Decreased gut microbial diversity is associated with greater depression symptoms in adults. Findings on the relationship between the gut microbiome and depression or anxiety in children and adolescents are mixed, and evidence syntheses are needed. Seven databases were searched for peer-reviewed studies on the gut microbiome and internalizing symptoms, depression, or anxiety, in children and adolescents (<19 years). Random-effects meta-analyses of alpha diversity indices were performed. Youth advisors validated the research findings’ relevance to their experiences and contributed to dissemination planning. Eight studies were included, representing 2,865 participants (mean age = 11.4 years, SD = 4.3). Study designs were cross-sectional ( n = 5), longitudinal ( n = 2), and interventional ( n = 1). No association was found between alpha or beta diversity and internalizing problems, depression, or anxiety. Increased abundance of genera within phyla Bacillota (e.g., Fusicatenibacter ) and Pseudomonadota (e.g., Escherichia ), along with decreased abundance of other Bacillota genera (e.g., Faecalibacterium ), were associated with depression and anxiety symptoms. This review identified preliminary associations between specific bacterial taxa and depression and anxiety in children and adolescents. Larger studies using comprehensive analytical approaches are needed to explore the role of the gut microbiome in the genesis and treatment of internalizing disorders.
