Roman gladiators ate a mostly vegetarian diet and drank ashes after training as a tonic. These are the findings of anthropological investigations carried out on bones of warriors found during excavations in the ancient city of Ephesos.
http://www.sciencedaily.com/releases/2014/10/141020090006.htm
http://www.sciencedaily.com/releases/2014/10/141020090006.htm