Dietary increase in serotonin reduces self-injurious behaviour in a Down's syndrome adult

A 26-year-old profoundly mentally handicapped woman with Down's syndrome and severe self-injurious behaviour was treated by dietary means. Treatment consisted of regular institutional entrees, supplemented with serotonin-containing foods, and modified to ensure dietary sources of potassium each intake and low protein relative to carbohydrate. Dramatic benefit was evident the first day and, after 6 months self-hitting was still close to 90% lower than baseline rates. Relevant literature was discussed regarding why a serotonergic approach was chosen for reducing self-injury.