A 61-year-old Texas man stumbled into the emergency room completely inebriated, yet he claimed he hadn’t had any alcohol. He was given a breathalyzer test and it revealed that the drunk man had a blood alcohol concentration of 0.37 percent, nearly five times the legal limit for driving in Texas. The medical staff dismissed the man to just be a drunkard. However the man continued to seek help for his mysterious intoxication. Barabara Cordell, the dean of nursing at Panola College and Dr. Justin McCarthy were willing to investigate his curious case and isolated the man in a hospital room for a full 24 hours. During his stay the man had a blood alcohol concentration of 0.12 percent from eating food.
From Huffington Post:
The man’s belly was brewing booze due to a buildup of Saccharomyces cerevisiae — a common yeast — in his gut, Cordell discovered. When he ate or drank starch-heavy foods, including bagels, pasta and soda, the yeast in his belly fermented the sugars into ethanol.