Childhood Stress Linked to Increased Risk of Digestive Disorders in Adulthood: Study

A new study published in Gastroenterology reveals that early life stress may significantly increase the risk of developing long-term digestive disorders by altering the gut-brain connection and the Sympathetic Nervous System. The research highlights how emotional neglect and adverse childhood experiences can disrupt key biological pathways that regulate gut function.

The study explored how early stress affects communication between the brain and gut—often referred to as the gut-brain axis. When this connection is disrupted, individuals may develop conditions such as irritable bowel syndrome, chronic abdominal pain, and abnormal bowel movements like constipation or diarrhea.

Using mouse models, researchers simulated early life stress by separating newborn mice from their mothers. As adults, these mice showed increased anxiety, gut pain, and motility issues. Interestingly, symptoms differed by sex, with females developing diarrhea and males experiencing constipation. Further analysis revealed that multiple biological pathways are involved. For example, blocking sympathetic nerve signals improved motility but not pain, while Serotonin pathways influenced both pain and gut movement.

The findings were supported by two large human studies. A Danish cohort of over 40,000 children showed that maternal depression—especially when untreated—was associated with a higher risk of digestive disorders in offspring. Another U.S.-based study involving nearly 12,000 children found that adverse childhood experiences increased gastrointestinal symptoms regardless of sex.

Overall, the study suggests that early developmental stress can have lasting effects on gut health by reshaping brain-gut communication.

These insights highlight the need for personalized treatments targeting specific biological pathways and emphasize the importance of considering childhood experiences when managing digestive disorders.

REFERENCE: Najjar S, Kildegaard H, Talati, et al.; Enteric and Sympathetic Nervous System Pathways Mediate Early Life Stress Effects on Gut Motility and Pain: Mechanistic Findings with Human Correlation; Gastroenterology, 2026; DOI: 10.1053/j.gastro.2026.02.030