His body brews beer: Man constantly smells of alcohol - without drinking. A teacher from the USA was often labeled an alcoholic because he always appeared drunk.

In reality, he was suffering from a rare disease. Florida State teacher Mark Mongirado was someone who always seemed drunk. Only this was not due to excessive alcohol consumption, but rather due to the so-called auto-brewery syndrome, a disease in which sugar is converted into alcohol in the intestines. The disease is caused by a disruption of the microbiome in the gut.