—Jeffrey G. Wiese, Michael G. Shlipak, and Warren S. Browner, “The Alcohol Hangover”, Annals of Internal Medicine, vol. 132 no. 11, 6 June 2000, pp. 897-902, at p. 899
If true, this observation cuts across the Russian distinction between intoxication (интоксикация) by alcohol and hangover (похмелье) construed as withdrawal from that toxic substance. Stateside, hangovers are the province of alcoholic dilettanti, as per their R—E—M—O—R—S—E, immortalized by George Ade. Furthermore, the ease of consumption attributed to good vodka by good Russians, is in all likelihood also due to the lack of fusel oils.