Kelly Brownell, a Yale psychologist and epidemiologist, delivered the 13th Annual Dr. and Mrs. Frederick W. Barnes Jr. Lectureship in Public Health April 17 with a talk about the nation’s obesity epidemic, including how food marketing affects diet, and the policy possibilities for reducing consumption of sugary and sweetened foods and beverages. Brownell offered emerging evidence that highly processed, sugary foods may be addictive. His talk, titled, “Changing the American Diet: Do we Have the Guts?” headlined Public Health Research Day in Andrews Dining Hall. Earlier in the afternoon, the event gave center stage to more than 50 posters by student and faculty researchers in the University’s Program in Public Health.