How Does Alcohol Cause Hangovers Judy Grisel

A few too many drinks on a night out, and you most likely wake up with a pretty unenjoyable Judy Grisel: How does alcohol cause hangovers? 00:07 In a 1973 study, 20 volunteers got drunk once a week for 8 consecutive weeks, each time on a different A cup of eggnog, some champagne, a few holiday drinks here and there -- it all adds up.