UCLA Center for Neurovisceral Sciences & Women’s Health, Departments of Medicine, Physiology and Psychiatry, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA UCLA Center for Neurovisceral ...
The other 10 per cent is found in the brain. Snyder noted that serotonin is also produced in the enterochromaffin cells in the gut, which are in the epithelial layer in the gastrointestinal tract.