The pellagra epidemic of the early 20th century may have been the deadliest epidemic of a specific nutrient deficiency in U.S. history. Part one covers what it is, its appearance in 19th-century Italy, and the first reports of it in the U.S.
Research:

Behind the Scenes Minis: Smashing Linoleum
19:47

Frederick Walton and the Invention of Linoleum
41:32

Swing Riots
36:33