BACKGROUND:Most studies provide evidence that the skin flush response to nicotinic acid (niacin) stimulation is impaired in schizophrenia. However. only little is known about niacin sensitivity in the ultra-high risk (UHR) phase of psychotic disorders. METHODS:We compared visual ratings of niacin sensitivity between adolescents at UHR for psychosis according to the one year transition... https://www.markbroyard.com/