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More on tolerance

Conversely, some people have an alcohol intolerance, which doesn’t get them drunk quicker, but does make drinking unpleasant.

"About half the Asian population and a small percent of the rest of the population get flushed, headachey, dizzy, and even have heart palpitations shortly after drinking alcohol," Dr. Zakhari says. "They lack ALDH, so the toxins linger in their systems."

Next: Myth: I’ve had one drink in an hour, so I’m safe to drive