Some of it is down to that. Some is down to the metabolic products of ethanol, specifically aldehydes. There are other alcohols (like tert-Amyl alcohol) that p

Some of it is down to that. Some is down to the metabolic products of ethanol, specifically aldehydes. There are other alcohols (like tert-Amyl alcohol) that people have used recreationally which don't cause hangovers in the same way. There are other great reasons not to mess with these substances (tert-Amyl is very long lasting and as little as 30ml might kill you), but they do show that some of the hangover is down to the specifics of ethanol's breakdown in the body.