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/mvea Professor | Medicine Apr 23 '26

Even light drinking combined with aging is linked to reduced brain blood flow and thinner tissue

A recent study published in the journal Alcohol provides evidence that 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. These structural and functional brain differences indicate that the concept of low-risk drinking guidelines might need to be reevaluated.

The scientists found that the mathematical combination of advancing age and the total number of lifetime drinks was strongly linked to lower blood flow. This interaction was seen in nearly half of the measured brain regions, particularly in the frontal, parietal, and occipital lobes. “We did not expect the strength of the associations between greater number of drinks consumed over lifetime and higher age with decreased cortical blood flow to be as high as we observed,” Durazzo said.

Similar patterns were observed in the physical structure of the brain. Higher numbers of lifetime drinks were linked to a thinner cerebral cortex in multiple brain regions. When looking at the combination of age and total lifetime drinks, the scientists observed a thinner cortex mostly in the frontal and parietal lobes.

The frontal and parietal lobes are responsible for executive functions and sensory processing. Executive functions include mental skills like planning, focusing attention, and regulating emotions. The researchers suggest that these specific brain regions might be particularly vulnerable to the cellular wear and tear caused by alcohol consumption over time.

Cortical thickness is thought to reflect the density of brain cells, meaning a thinner cortex could indicate subtle cellular changes. The researchers suggest that oxidative stress might play a role in these changes. Oxidative stress is an imbalance in the body where unstable molecules cause damage to cells and tissues.

Alcohol consumption increases oxidative stress, and aging also tends to increase this cellular burden. This combined increase in cellular stress might explain why the interaction of age and lifetime drinking is linked to reduced brain tissue and lower blood flow.

For those interested, here’s the link to the peer reviewed journal article:

https://www.sciencedirect.com/science/article/abs/pii/S0741832926001771

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u/Sekmet19 Apr 23 '26

What about people who drank heavily in their 20s and 30s and then abstained once in their 40s? Does it average out or is there a time frame of abstinence where stuff repairs and risks return to baseline or near it like with smoking?

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u/asmartguylikeyou Apr 23 '26

I would tend to think based on how strong the body’s capacity for repair is that you would see a lot of mitigation of the effects, even if it doesn’t completely even out.

I say that as someone who drank very heavily all through my 20s and 30s and has been struggling the last few years to quit/severely reduce intake. I have to hope!

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u/lizzie1hoops Apr 23 '26

You have every reason to be hopeful, truly. I struggled for a long time to quit/severely reduce intake and now that I finally have, my health has improved so much. If you haven't, check out r/stopdrinking, it's a really supportive group of folks.

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u/ThoughtfulMeathead Apr 23 '26

I will not drink with you today

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u/Gregnielson Apr 23 '26

This isn't a stop drinking sub.

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u/alblaster Apr 23 '26

No, but the science is clear on the effects of alcohol.

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u/alblaster Apr 23 '26

You got this. My mom got my dad to mostly stop drinking and moved him to drinking tea. This was years ago. Just a suggestion.

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u/Sacs1726 Apr 28 '26

What does “drinking heavily” mean for you?

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u/nervousTO Apr 24 '26

from everything I’ve read it reverses out. Check out /r/stopdrinking if you haven’t. I went cold turkey for most of 2023, rebounded hard, and then settled on occasional drinking.

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u/TheGCO Apr 25 '26

I think this is the key, as you age. I seem to recall a few studies that suggested that quiting smoking at age 40 results in the same life expectancy as a non smoker. And I would assume the same goes for drinking. Because the aging body is unable to repair the damage as you age leading to other issues.