One of the key contributing factors to a hangover is the amount of congeners the drink has. ...

One of the key contributing factors to a hangover is the amount of congeners the drink has.
 
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The bystander effect includes students who do not drink but report having their sleep and/or studying affected by a roommate's drinking.
 
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A 12-ounce beer has less alcohol than a 1.5 ounce shot of tequila.
 
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Among college students, women, minorities, and married students have lower rates of drinking than students in other categories.
 
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Distilling ethyl alcohol decreases its concentration of alcohol.
 
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