Washington: Scien- tists have shown in new research that dietary changes are linked to alterations in gene expressions that could affect overall health and physiology. Even the most health-conscious eaters find themselves indulging in junk foods from time to time. New research by scientists at the University of Massachusetts Medical School (UMMS) raises the striking possibility that even small amounts of these indulgences may produce changes in gene expression that could negatively impact physiology and health.