Probiotics and maternal mental health: limited evidence on prevention
A review found some symptom improvements during pregnancy and after childbirth, but the results do not establish that probiotics prevent diagnosed mental health disorders.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Some included trials reported lower depression or anxiety symptom scores with probiotics. However, the review found limited evidence, and all trials had concerns about bias. Because the reported outcomes were symptom scales, these findings do not establish that probiotics prevent diagnosed mental health disorders during pregnancy or after childbirth.
Study differences prevented pooling. Bias was rated moderate in 3 trials and high in 1, mainly because of selective outcome reporting. This abstract-based summary cannot resolve those concerns.
What researchers found
Postpartum depressive symptoms
In one trial, probiotics versus placebo at postpartum days 45 and 90; differences were statistically significant, but the abstract does not identify the questionnaire.
What was actually tested
The review searched for trials of prebiotics, probiotics and synbiotics, but the included studies all tested probiotics. Its findings therefore cannot answer whether prebiotics or synbiotics affect maternal mental health.
Symptoms versus prevention
Lower questionnaire scores describe changes in reported symptoms. The abstract does not report whether fewer participants developed a diagnosed disorder, so its prevention question remains broader than the outcomes presented.
The original publication
Prebiotics, probiotics, and synbiotics and maternal mental health during pregnancy and postpartum period: a systematic review.
Martín-Peláez S, Martín-delosReyes LM, Cano-Ibáñez N
Front Nutr · 2026
- PubMed ID
- 41783815
- Record checked
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