The role of the dopamine-regulating COMT gene in cognitive function has been the subject of debate. Now a large study of older adults has revealed that the Met variant of the COMT gene was linked to a greater decline in cognitive function. This effect was more pronounced for African-Americans.
The role of the catechol-O-methyltransferase (COMT) gene in cognitive function has been the subject of some debate. The gene, which affects