The man, in his late 40’s at the time, refused to take a breathalyzer test and was taken to a hospital, where his initial blood alcohol level was found to be 0.2% — about 2.5 times the legal limit and the equivalent of consuming 10 drinks an hour. Despite the man swearing up and down that he hadn’t had anything to drink, doctors didn’t believe him either.
But researchers at the Richmond University Medical Center in New York eventually discovered that the man was telling the truth. He wasn’t downing beers or cocktails — instead, there was yeast in his gut that was likely converting carbohydrates in the food he ate to alcohol.
In other words, his body was brewing beer.
The man, whose identity has not been revealed, had a rarely diagnosed medical condition called auto-brewery system (ABS), also known as gut fermentation syndrome.