http://vinepair.com/articles/tequila-wasnt-responsible-for-your-hangover-your-dna-was/
A recent study performed on 4000 twins from Australia has shown that your DNA and genetic makeup influence your likelihood of getting a hangover, and the severity of that hangover. These genetic markers are also closely tied to the amount of alcohol your body craves, so now after a heavy night of drinking, just blame your parents.
