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Beer triggers the release of Dopamine.

Dopamine is associated with Gambling drive, overwhelming Sex drive, among other things.

Story:

To see how the taste of beer affects the brain, researchers gave a group of men tiny tastes of beer, and as the men sipped the beer, the researchers scanned the men’s brains. After a taste of beer, the men's brains showed a notable release of dopamine, a brain chemical associated with the pleasurable experience of consuming alcohol and other drugs. The effect was even greater among men who had a family history of alcoholism.

The findings are not surprising, scientists say, but having a way to assess predisposition to alcohol abuse could be useful.

"We believe this is the first experiment in humans to show that the taste of an alcoholic drink alone, without any intoxicating effect from the alcohol, can elicit this dopamine activity in the brain's reward centers," the study's senior author, neuroscientist David Kareken of the Indiana University School of Medicine, said in a statement. The findings were detailed online today (April 15) in the journal Neuropsychopharmacology.

Dopamine, a brain chemical widely associated with pleasure, has long been linked to the consumption of alcohol and other drugs. Sensory cues — such as tastes, smells or the sight of a bar — can elicit cravings to drink and cause relapses in recovering alcoholics. Dopamine may be critically involved in such cravings, scientists believe. [ 11 Interesting Facts About Hangovers ]