Summary
This narrative review synthesises emerging evidence on the bidirectional communication between gut microbiota and the central nervous system, particularly in relation to mood disorders. The authors highlight that whilst dietary and microbial interventions show promise, substantial research gaps remain in establishing mechanistic understanding and personalised treatment protocols that account for age, sex, medication history, and lifestyle factors. The review underscores the need to integrate microbiota science into psychiatric research to develop more targeted and efficacious therapeutic strategies.
Regional applicability
As a mechanistic and treatment-focused review without a specific geographical study population, the findings are broadly applicable to United Kingdom clinical and research contexts. However, implementation of microbiota-targeted interventions would require integration within existing NHS mental health pathways and validation in United Kingdom cohorts.
Key measures
Gut microbiota composition changes; brain function and behavioural outcomes in mood disorder patients; therapeutic response to microbiota-targeted interventions
Outcomes reported
The review examined evidence on how alterations in gut microbiota composition influence the gut-microbiota-brain axis and affect brain function and behaviour in mood disorders. It evaluated the efficacy of dietary interventions, prebiotics, probiotics, and faecal microbiota transplantation as potential therapeutic approaches.
Supporting research
Author abstract expressly discusses dietary interventions, prebiotics and probiotics in mood-disorder microbiota mechanisms.
Limits: Mixed clinical/mechanistic synthesis; promising findings are not an established treatment effect or advice. Diet, drugs, FMT and their underlying study designs must remain distinct.
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