← All articles
Nutrition
The Gut-Brain Connection: Why Your Digestion Affects Your Mood
Dr. Elena Marsh · 8 min read · 2026-09-02

The gut and brain are in constant conversation through the vagus nerve, a cranial nerve that acts as a bidirectional information highway. This is why digestive distress so often accompanies anxiety, and why chronic stress can disrupt digestion.
When the gut microbiome is diverse and resilient, it produces neurotransmitters like serotonin and GABA that directly influence mood. Roughly 90% of the body's serotonin is produced in the gut.
Supporting this axis means addressing both ends: reducing nervous system load through breathwork and sleep, while nourishing the microbiome with fiber, fermented foods and targeted botanicals.
