The Ebers Papyrus (c1550 B.C.), a collection of ancient Eygptian medical texts was purchased in Luxor, in 1872 by the Eygptologist George Ebers. It presents 250 clinical pictures in over 800 paragraphs.
According to Lieberman: "The Papyrus contains a prescription for an antidiabetic diet of wheatgerm and okra."
Lieberman, L.S. (2000) Diet and Chronic Disease. Cambridge World History of Food. Cambridge University Press.