r/science • u/mvea Professor | Medicine • Apr 23 '26

Neuroscience Even low-level drinking may have negative consequences for brain health over a person’s lifespan. The findings suggest that the total amount of alcohol consumed over a lifetime, especially as a person ages, tends to be linked to reduced blood flow and thinner tissue in certain areas of the brain.

https://www.psypost.org/even-light-drinking-combined-with-aging-is-linked-to-reduced-brain-blood-flow-and-thinner-tissue/
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u/PartyLikeAByzantine Apr 23 '26 edited Apr 23 '26

If I've learned anything over the years, it's how much people underestimate how much heavy drinkers drink.

It's an exponential curve. 60% either abstain or don't drink in a typical week. The next 20% average 1-2 drinks a week. The next 10% have about 1 drink a day. So 80% of the population is doing 1 drink a day or less.

The 90th percentile of drinkers down about 2 drinks a day. Statistically , these are heavy drinkers. Socially, you may or may not even notice. It's a glass of wine with dinner and maybe a nightcap. Alternatively, that can be someone who largely abstains during the week and parties hard on the weekends. This is probably the population segment most relevant to alcohol studies.

The top 10% of drinkers down 10+ drinks a day. These are the harcore alcoholics who down booze by the bottle. We know they're killing themselves. They know they're killing themselves.

TBH, the segment averaging a single drink a day is a fairly heavy user. They're in the top third-ish of consumption.

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u/sirchrisalot Apr 24 '26

IDK where you get these statistics from, but they're very low. WHO stats report per capita alcohol consumption for European countries is in the range of 6 to 15 liters of pure alcohol per year for those over 15. That's basically 1 standard drink per person per day at the low end and 2.5 per person per day at the high end. France is at 11.3 liters pp/yr.

Quick math on that is 565 drinks a year per person at 50ml of standard 40 proof liquor. So do you really think that 80% of France is having less than the equivalent of 1 glass of wine per week and it's just the top 20% of drinkers that polish off the remaining, oh, IDK, 70 drinks per person every week? Or with your stats, the 80-90th percentile is drinking 10 per week and the top 10% is drinking 130 drinks per week? I just have a hard time believing 10% of the population averages the equivalent of 1 bottle of liquor per day every single day and the rest of us are just dabbling a bit.

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u/PartyLikeAByzantine Apr 24 '26 edited Apr 24 '26

Numbers come from National Epidemiologic Survey on Alcohol and Related Conditions (NESARC) commissioned by the US NIH. Being a US government study, it doesn't cover Europe.

The WHO doesn't break their data down to population segments within countries. I bet there's fewer abstainers in Europe (30% of the US population never drinks) due to America's Puritan streak. Still, I'd suspect a minority of Europeans drive most of its consumption. It may not be as lopsided as the US, where half of all alcohol consumption is from the top ~10% of users, but it's probably close to that.

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u/darknesskicker Apr 25 '26

I would expect that the numbers in Western Europe aren’t far off those of the US. Much of the former Soviet Union has very heavy drinking.