Alcoholic Dementia — Why Regular Drinking in Your 30s Can Shrink Your Brain

‘I clearly got home safely after the company dinner, but why can’t I remember anything?’ If you have been experiencing this frequently lately, you might be heading toward irreversible alcoholic dementia.

Even if it isn’t a heavy drinking session, a glass of wine enjoyed alone at home can slowly cause your brain to shrink.

What happens to our brain when we drink alcohol? Dr. Kim Ji-yong, director of Yonsei Well Mental Health Clinic and host of the YouTube channel ‘Brain Rich Psychiatrists,’ points out that today’s drinking culture—where individuals enjoy their preferred drinks based on personal taste rather than forced company drinking—can actually fuel alcohol addiction.

Why Solo-Drinking is Specially Detrimental to Brain Health

Patients often tell me, ‘I read articles saying a single glass of alcohol is good for health, so what’s the problem?’ When alcohol enters the body, it turns into a substance called acetaldehyde, and enzymes are released to break it down. However, these enzymes don’t just break down alcohol; they also break down active oxygen simultaneously and can slightly raise beneficial HDL cholesterol. Consequently, some research results indicate it is better for the cardiovascular system.

However, damage continuously accumulates in the brain. Generally, people think alcohol addiction only occurs in heavy drinkers, but both drinking amount and frequency matter. Drinking even a single glass of alcohol every day leads to alcohol dependency.

Alcoholic dementia can occur regardless of age. I have seen a patient in their 30s suffering from alcoholic dementia who could not remember anything at all. While early-onset Alzheimer’s dementia can exist, it is a very rare case.

Early Warning Signs of Alcoholic Dementia

There are preliminary stages of alcoholic dementia. Symptoms appear such as confusion during waking hours in the day, speaking illogically, and walking unsteadily. Even without drinking during the day, individuals may stumble and fall. Symptoms like confabulation—fabricating stories about events that never actually happened—also appear. It is crucial to get treated quickly at this stage. Missing the treatment window leaves no options, leading directly to dementia.

One of the representative phenomena of brain damage caused by alcohol is a blackout (memory loss). To prevent this…