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From mental_floss:
Here's something tailgaters, ice skaters, skiers and other cold weather fans might want to keep in mind: Drinking boozy beverages will make you feel warmer, but it doesn't actually keep you warm or prevent hypothermia. Instead, drinking alcohol lowers the core temperature of your body.
According to Dr. William Haynes, director of Clinical Pharmacology at the University of Iowa, "Consumption of alcohol undoes many of the human body's healthy reflexes, one of which is keeping the core body temperature warm in cold weather." It doesn't even take that much for this effect to kick in-just one alcoholic drink will start the process that results in a lowered core body temperature.
How does alcohol do this, and why does drinking alcohol make you feel warmer, even though you actually are getting colder?
Read the whole article
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