What happens when carbohydrates ferment in the small intestine (and sometimes in other parts of the body)? The result is the production of intoxicating quantities of ethanol, also known as ethyl alcohol or grain alcohol. Bottom line: The ethanol is absorbed in the small intestine, causing an increase in blood alcohol concentrations that produce the effects of intoxication without the consumption of exogenous (from the outside) alcohol. As levels of ethanol increase, the individuals exhibit behaviors common to alcohol intoxication. This can include slurred speech, difficulty walking, headaches, drowsiness lack of mental acuity, vomiting, and so on. The individual may protest that “I ingested no alcohol!” Unfortunately, people may not believe that because the person looks and acts ‘drunk.’ More tomorrow.