It is possible to get drunk without drinking a drop of alcohol.
A Texas man who would get drunk at random times while swearing up and down that he hadn’t been drinking. Doctors isolated him in a booze-free hospital room for 24 hours and, sure enough, his BAC level magically rose.
It seems he had a lot of brewer’s yeast in his gut: He was, a home brewer, and when he ate carb-rich foods, the yeast started fermenting. “The man’s intestinal tract was acting like his own internal brewery.”
NPR dug up a handful of similar cases, usually involving antibiotics that eliminated gut bacteria and allowed yeast to gain a foothold.
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