The Cancer Institute of New Jersey 1 article published in JoVE Medicine Minimal Erythema Dose (MED) Testing Carolyn J. Heckman1, Rachel Chandler2, Jacqueline D. Kloss3, Amy Benson2, Deborah Rooney2, Teja Munshi1, Susan D. Darlow1, Clifford Perlis4, Sharon L. Manne5, David W. Oslin2 1Cancer Prevention and Control Program, Fox Chase Cancer Center, 2Department of Psychiatry, University of Pennsylvania, 3Department of Psychology, Drexel University, 4Department of Medicine, Fox Chase Cancer Center, 5Cancer Prevention and Control Program, The Cancer Institute of New Jersey This article describes how to conduct minimal erythema dose (MED) testing in order to determine the lowest dose of ultraviolet radiation that will cause erythema (burning) when administered to an individual.