Microbiota transplantation trials report lower depressive-symptom scores, with lasting effects uncertain
The pooled symptom estimate favored transplantation, but was smaller in a sensitivity analysis and weakened with longer follow-up.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The review found lower depressive-symptom scores after fecal microbiota transplantation, but the effect size changed substantially in a sensitivity analysis. Reported benefits weakened over time, and participants had differing underlying conditions. The abstract supports further investigation, with uncertainty about lasting symptom improvement and who might benefit.
The abstract omits control treatments and safety findings. Subgroup estimates alone cannot establish that a delivery route or patient group responds better; longer-term effects remain uncertain.
What researchers found
Depressive symptoms: standardized mean difference
The group difference is measured relative to score variability, in standard deviations, not symptom-scale points or percentages. Negative favors transplantation; control treatments and pooled assessment timing were not specified.
Results depended on analysis
Both the main analysis and a sensitivity check found lower symptom scores. The smaller effect in the sensitivity analysis shows that the estimated size of improvement depended on how the evidence was analyzed.
Durability and subgroup questions
Benefits were described as strongest over short to medium follow-up, with weaker effects later. The abstract reports subgroup patterns by clinical condition and delivery route without enough detail to establish reliable comparative advantages.
The original publication
Clinical efficacy of fecal microbiota transplantation in alleviating depressive symptoms: a meta-analysis of randomized trials.
Zhang X, Li Y, Guo Y et al.
Front Psychiatry · 2025
- PubMed ID
- 41122746
- Record checked
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