The Curse of Crafting Beer in Your Own Stomach

Beer. We enjoy it at tailgate parties. We toast with friends over it. And, for a rare few, we actually produce it within our own bodies. Wait, really?

Indeed, it’s a fact. Certain individuals generate beer in their stomachs, though it’s far from convenient. Those with this condition have faced arrests for unintentionally driving while under the influence of alcohol and have been labeled as "secret drinkers" by loved ones and healthcare providers.

For individuals suffering from auto-brewery syndrome, consuming carbohydrate-heavy foods like bagels, pasta, or sugary sodas can trigger a chain of unfortunate digestive processes, leading to increased blood alcohol levels.

While the average person’s digestive system produces minimal ethanol during regular digestion, those with auto-brewery syndrome experience an overabundance of specific yeast or bacteria strains, causing an exaggerated response. This condition leads to symptoms of alcohol intoxication without the individual consuming any alcohol.

Though uncommon, auto-brewery syndrome impacts both adults and children and is often underdiagnosed. Consequently, sufferers may attribute their symptoms to other conditions, such as chronic fatigue syndrome, irritable bowel syndrome, or memory issues. Their daily lives are marked by nausea, burping, and dizziness.

Individuals who consume diets rich in carbohydrates and sugars are considered most vulnerable, as these nutrients fuel the yeast and bacteria responsible for fermentation and ethanol production.

People with diabetes, fatty liver disease, or frequent bowel blockages are believed to face a higher risk. Additionally, antibiotic use, which can alter the gut’s microbiome, has also been linked to the development of this condition.

The syndrome was initially documented in Japan in 1952 but didn’t receive an official name until 1990. Diagnosing auto-brewery syndrome typically involves isolating patients while they consume high-carb, high-sugar diets and monitoring them for signs of intoxication. Elevated blood-alcohol levels may indicate the condition, prompting treatment for yeast or bacterial overgrowth and recommendations for dietary adjustments.