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The Claim: Some Types of Alcohol Cause Worse Hangovers Than Others

THE FACTS Too much alcohol of any kind can cause sickness and regret the
morning after. But it’s often said that some kinds of drinks are worse than
others.

Experts say that the type of alcohol you drink does make a difference, but
for various reasons. Among the most important is the amount of congeners
(pronounced CON-juh-nurz) — complex organic molecules, like methanol —
in a particular drink. Impurities in poorly refined spirits like cheap vodka can
also play a role, but congeners, which are common in darker liquors, seem
to have the greatest effect.

According to one report in The British Medical Journal, which looked at the
effects of different types of alcohol, the drink that produced the most
hangover symptoms was brandy, followed by red wine, rum, whiskey,
white wine, gin and vodka. Another study showed that bourbon was twice
as likely to cause sickness as the same amount of vodka.

There is also wide variation within certain categories, like wine. Wines that
come from countries where a small change in climate can greatly affect
their quality, some experts say, can contain significantly more hangover-
inducing compounds in a bad season. Inexpensive red wines, in particular,
have a reputation for causing sickness. But that may be because some
people suffer from a syndrome called red wine headache, whose cause is
unknown. What scientists do know is that the wines that cause it vary
from person to person, and across brands, grapes and price.

http://www.nytimes.com/2006/11/07/health/07real.html?_r=1&oref=slogin