Turns out your coffee addiction may be doing your brain a favor
- Reference: 1774095010
- News link: https://www.theregister.co.uk/2026/03/21/turns_out_your_coffee_addiction/
- Source link:
Researchers from Mass General Brigham [1]tracked more than 130,000 people for over four decades and found that those who regularly consumed moderate amounts of caffeinated coffee or tea had an 18 percent lower risk of developing dementia compared to those who rarely touched the stuff.
Milk IN the teapot: Innovation or abomination? [2]READ MORE
Caffeine swiggers also scored better on some cognitive tests and were less likely to complain about memory slips, according to the study.
Before anyone starts mainlining espresso shots in the name of science, the apparent benefits weren't tied to heroic levels of caffeine intake, just to steady, mid-range consumption – roughly two to three cups a day – suggesting that consistency matters more than turning yourself into a walking coffee bean.
The data comes from the long-running Nurses' Health Study and Health Professionals Follow-Up Study, which repeatedly tracked participants' diets, cognitive performance, and dementia diagnoses over time. Of the cohort, 11,033 people developed dementia, giving researchers a sizeable dataset to work with rather than the usual small-scale snapshot studies.
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Participants who stuck to that middle lane appeared to maintain memory and thinking skills more effectively as they aged, with a lower risk of cognitive decline compared to their less-caffeinated peers.
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That doesn't mean caffeine is some kind of miracle anti-dementia elixir, sadly depriving Silicon Valley of its next "biohack your brain" pitch deck. The researchers are careful to point out that the findings are observational, meaning that they can spot patterns but can't prove cause and effect.
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[9]Those who 'circle back' and 'synergize' also tend to be crap at their jobs
Still, there are plausible explanations for why caffeine might help. Previous research has linked it to improved blood flow, reduced inflammation, and effects on brain signaling – all things you'd quite like to keep in working order once your warranty starts to expire. Of course, it's also entirely possible that habitual coffee drinkers differ in other ways, such as diet, lifestyle, or socioeconomic factors, which could be doing some of the heavy lifting.
Even so, the sheer length of the study – 43 years – gives it a bit more weight than the usual "scientists watched 12 undergrads for a fortnight" variety. Tracking habits over that kind of timespan is no small feat, and it offers a rare glimpse into how everyday behaviors play out over the long haul.
So while caffeine won't turn you into a genius or stop you from forgetting why you walked into a room, it might help keep the lights on upstairs for a little longer. ®
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[1] https://www.sciencedaily.com/releases/2026/03/260318033138.htm#google_vignette
[2] https://www.theregister.com/2016/07/29/milk_in_teapot_debate/
[3] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/science&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2ab7OtWNGkE7gcy87yKGBWwAAAZE&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0
[4] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/science&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44ab7OtWNGkE7gcy87yKGBWwAAAZE&t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0
[5] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/science&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=3&c=33ab7OtWNGkE7gcy87yKGBWwAAAZE&t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0
[6] https://www.theregister.com/2020/05/13/bork/
[7] https://www.theregister.com/2026/03/17/scientists_build_farttracking_underwear_discover/
[8] https://www.theregister.com/2026/03/16/digital_fruit_fly_brain_model/
[9] https://www.theregister.com/2026/03/15/corporate_jargon_research/
[10] https://whitepapers.theregister.com/
Specificity
> two to three cups a day
A quick rummage around the kitchen cupboard reveals we have a range, from dainty little cappuccino cups holding 70ml to mugs of 350ml capacity. And that is before we get into how many scoops of ground coffee goes into the brewing process. Plus the added variable of milk.
I can see that even by sticking to the recommended quantity, could easily mean a 10:1 difference in the amount of active ingredients.
Still, at least this avoids the ridiculous idea of measuring solid recipe ingredients in "cups" instead of by weight.
Re: Specificity
Cups ? a metric cup is I believe 250ml (also Australian cup)
The (old) UK cup was/is 10 fl. oz. (284ml) and the US cup 8 fl. oz. (237ml) and the US fl. oz. is ~4% larger larger than the imperial.
Bit of a mess really.
Canada apparently both the metric cup and US cup are still used and I think I read that ~200ml cups were once used for some ingredients.
In the case of a cup of coffee the caffeine content is likely to vary even more - between brewed and instant or between the beans themselves. The assumption that it's the caffeine in coffee (or tea) that is retarding the loss of marbles might be misplaced - might be some antioxidant peculiar to these beverages. Just as likely that individuals with a congenitally less firm grip on their marbles prefer beer or carbonated drinks instead.
A question
What about the coffee that has been through a civet?
Is kopi luwak good for you?
Is civet brown matter good for your grey matter?
Read the link
The good news for me is that more doesn't hurt. I drink coffee and tea, probably the 2-3 coffees AND the 2-3 teas during a day. I'd be a zombie without enough caffeine to keep me awake.
And unfortunely the link indicates only a couple percentage points difference between the groups. So like 7% of the caffeine drinkers had the lights go out versus around 9 for the non. Better, though not liking even a 7% chance of nobody home upstairs for me.
Encouraging, but...
"The researchers are careful to point out that the findings are observational, meaning that they can spot patterns but can't prove cause and effect."
There is that lingering doubt. Dementia develops over decades. There is still that off chance that early dementia leads to a life style where people drink less coffee.
However, I don't mind drinking coffee daily, so why not? I don't have to wait for this to be validated in some future time.
But do a really have to limit myself to 3 cups a day?
Cup size
My cup is marked as 720ml and keeps the coffee hot for several hours being a travel mug. I do limit myself to 3-4 cups a day :)
Could still be corellation and not causation.
Three times a day getting a coffee means three times a little break and focus the brain on something else, simple, like coffee. Something similar applies to smokers which make a smoke break several times a days. This is a little pause, so they can, in the end, perform the same work as the non smokers which did not get that pause (bad health effects of smoking aside).
Since this looks like a pure-USA study, where for the most rather insane amounts of work is expected due to the culture pressure and a few other factors, so the little pauses may have an even stronger effect than here.
On the long run the little pause breaks might prevent early Alzheimer as well. There is a reason why the study uses "could" "may", they know they see a correlation.
Personal note: For me I started with one milk coffee in the morning a while ago, it pushes the aging digestive system. I don't need any more coffee during the day, has no effect on me. But an afternoon coffee after 15:00 does have a negative effect on my sleep...
Right I
Must just nip and put the kettle on.