Brody Fogleman Harsh Jha Noel Brownlee JuliSu DiMucci-Ward Spartanburg, South Carolina, United States   James Woods Babcock (1856–1922). Photo courtesy of the Waring Historical Library, MUSC, Charleston, SC. Pellagra is a disease of vitamin B3 (niacin) deficiency. Niacin is the precursor for many physiologic processes involving nicotinamide adenine dinucleotide (NAD), an enzyme that carries out…