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Cannabis usage in older adults linked to larger brain, better cognitive function

https://medicalxpress.com/news/2026-02-qa-cannabis-usage-middle-aged.html
56•PaulHoule•2h ago

Comments

pixelpoet•1h ago
Interesting article, but immediately ran into one of my pet peeves:

> The work is published in the Journal of Studies on Alcohol and Drugs.

"Alcohol and drugs" is like saying "beef and meat".

hippo22•1h ago
When you hear someone say “I do drugs” do you imagine them sitting at a bar to have a drink?

Knowledge is knowing a tomato is a fruit, wisdom is knowing not to put it in a fruit salad.

superkuh•1h ago
We know. But it's a problem because alcohol is one of the most dangerous and damaging drugs. It's basically just society grandfathering it in and all of us living in a state of cognitive dissonance.

re: the article itself, they concentrate only on brain regions which have high density of CB1 expression and that's reasonable. But CB1 is not the only CNS cannabinoid receptor (CB2 mostly expressed peripherally). There's also GPR55 which is activated by cannabinoids like THC. A little issue which could be addressed in future work.

kevin_thibedeau•1h ago
Alcohol can be consumed without intoxication. Nobody smokes to not get high.
buellerbueller•1h ago
Wisdom is knowing when not to put a tomato in a fruit salad.

https://cheflindseyfarr.com/marinated-tomato-stone-fruit-sal...

(I second the recommendation of adding burrata.)

ssl-3•1h ago
When I hear someone say "I do drugs," first I imagine that they're a fucking narcotics agent, and then I end the conversation.
kannanvijayan•1h ago
Knowledge is being aware of the analogy of tomatoes not being treated like fruits even though they technically are.

Wisdom is understanding that if there was legislation on the matter, and people who ate, produced, or sold non-tomato fruits were hunted and deprived of their freedoms by the state on the basis that fruits are bad for society, then you would likely see similar frustrations expressed about an article title that includes the phrase "tomatoes and fruits" to distinguish them.

lo_zamoyski•46m ago
This is such a terrible analogy. Hunted?

Alcohol in moderation is relaxing. Most drugs, OTOH, when used at the doses that make them attractive to recreational drug users, impair reason, and impairing reason is not just stupid, but immoral. We can debate the particular methods by which the state regulates or otherwise deals with drug use, but there is nothing intrinsically wrong with the criminalization of such drugs as such. No one has a right to take drugs (there is no right to immorality). This may seem alien to a culture whose emaciated understanding of morality is exhausted by the concept of consent. The law is a teacher, and it is good to teach people that recreational drug use (and drunkenness) is a bad thing. Like all immorality, it is an insult to one's dignity and humanity.

We can tolerate the impairment of reason as a proportionate side effect [0] (for instance, high doses of morphine given to terminally ill patients in extreme pain), but this is not recreational use.

[0] https://plato.stanford.edu/entries/double-effect/

PlatoIsADisease•1h ago
Wittgenstein has an example, imagine you are on a construction site and someone says 'Slab!'

Do they mean 'That is a slab.' or 'Hand me that slab.'?

Context matters. There is no correct answer. There are no metaphysical truth particles that shake 'True!'. Expressivism, how you feel about the statement, is going to decide what you think.

Anyway, I used to intentionally say things like "I love drugs, although its specifically Caffeine."

micromacrofoot•1h ago
you can't ignore societal context though, most people do not consider alcohol a drug at this point... same story with caffeine

we have to operate in people space

swed420•1h ago
> most people do not consider alcohol a drug at this point

But that's presumably why the parent commenter spoke up in the first place.

Industry-fueled self-delusion can be intercepted if we make the effort to do so.

micromacrofoot•7m ago
I would argue that making the case on an individual level in this context can be more off-putting than helpful, and can have a negative effect.
dana321•1h ago
Animals and dogs
sejje•1h ago
Or a counterpoint, "humans and animals."

We see a distinction for that one, just like we do for alcohol.

lo_zamoyski•42m ago
There is a reason for this distinction. Alcohol in moderation is relaxing and can be enjoyable to the senses. Most drugs, and at the doses that make them appealing for recreational use, impair the exercise and function of reason and the sense faculties that inform it. (Drunkenness is bad for the same reason.) Given how central and essential to humanity reason is, that's an incredibly important distinction.
mothballed•1h ago
Weed is expensive. But not terribly addictive. Another words, a luxury product, but people will not usually forego necessities to get it like more addictive drugs.

I don't think there is any controversy there is at least a weak link between intelligence and access to luxury goods.

In other news, occasional cigar smokers have slightly lower cancer rates. It aint the cigars...

--------------------------------------------

Edit: those talking about price being cheap in US: the data is from UK biobank. Unclear to me if that's actually UK citizens, but prices in UK are significantly higher than those quoting legal weed state prices. It appears those downvoting / rebutting are attempting to strong-arm a US centric view into foreign sourced data.

  Using data from the UK Biobank, which includes health information from over 500,000 adults, associations between cannabis use, regional brain volume, and cognition in participants aged 40–70 years (mean age = 54.5) were evaluated.
cromka•1h ago
Weed is expensive? Compared to alcohol, it's cheaper, considering how little of it you need to maintain the intoxication.

Weed was never a luxury substance. Cocaine and others are.

Der_Einzige•1h ago
Yeah lmao, prices fell to the floor, especially on the US west coast.
tartoran•1h ago
It’s cheap for ocassional use, yes. However, heavy users spend quite a bit for their habit since their tolerance level is shut. Also I never found it to be addictive but that’s my own bias, there are a lot of users who can’t go to sleep without it, not to mention daily and frequent use.
PaulHoule•1h ago
In NY an individual can grow up to 5 plants legally a year and that's really a lot.

Because the hemp laws were poorly written, this product was legal in all 50 states

https://cyclingfrog.com/

The 10mg THC drinks give a whiff of cannabis when you open one and produce an intoxication similar to smoking with an experience similar to drinking an alcoholic drink. It's more expensive than the cheapest beer, but similar to a reasonably priced wine or drink in a bar. Unfortunately these will be gone in most places by the end of 2026.

neom•1h ago
THC does not evaporate into the air in appreciable quantities. What you smell is terpenes, flavor compounds, or carbonation carrying aroma, not psychoactive THC...
PaulHoule•47m ago
Agreed. I will say that the 5 mg THC/10 mg CBD drinks don't have the same smell and I don't know if that is just the terpenes that ride along naturally or if they add flavoring to make the stronger drink stronger smelling. I'd say the 5/10 drink is really not worth the bother.
squigz•1h ago
> It’s cheap for ocassional use

This can be said about any drug, but even then, heavy use of weed vs other drugs is absolutely cheaper, especially these days if you live in an area where it's legal and/or are willing to grow it.

mothballed•1h ago
I would expect the intelligence of sub-clinically addicted or non-addicted alcohol and cocaine users to also be above average.
Forgeties79•1h ago
Decent bud is cheaper than ever in most US states at least
ProfessorZoom•1h ago
someone might be scamming you on weed prices man
BugsJustFindMe•1h ago
> Another words

(in other words)

franktankbank•1h ago
Big brained olds love this one weird trick.
sschueller•1h ago
However other research shows a concerning association between long-term, heavy cannabis use and an increased risk of dementia, including Alzheimer's disease. [1]

[1] https://pubmed.ncbi.nlm.nih.gov/27886010/

throwfaraway4•1h ago
They call out moderation as being key
vovavili•1h ago
The OP's article screams "I failed to control for confounders". Not sure why it is being upvoted so heavily.
blamestross•1h ago
Yeah, this strikes me as just selecting against conservatism, which in turn correlates with worse health outcomes.
bigdict•1h ago
Was it a controlled study or just correlation?
gunsle•1h ago
As a long time marijuana user, these pro weed articles always crack me up. Sure it has some limited legitimate medical usages for pain or other applications. Vast majority of users are just addicts in denial, myself included for the longest time. Anthropologists in the future will be studying the effects of drastically increased marijuana consumption on society for decades in the future. I do wonder when the general populace will wake up to the propaganda, for example, how it’s clearly a gateway drug and clearly addictive on some level.
throwfaraway4•1h ago
I mean so is sugar, alchohol, synthetic opioids, ect. Pick your poison. Life is about trade-offs.
zdragnar•1h ago
You don't actually have to pick any of them.
hackeraccount•54m ago
Sure but the article seem to be suggesting this is a free lunch.
gunsle•18m ago
Except no one is going to outright lie to you that alcohol is “medicine,” that it’s not addictive, and that it’s entirely healthy to consume.
tsunamifury•1h ago
I’ve noticed it California since legalization use has skyrocketed and everyday intelligence seems to have gone through the floor. Similar to if we as a society started day drinking regularly.

I see people smoke all day all the time now and while driving and it clearly affects their judgement. I don’t know why legalization lead to “no moderation at all” and “I smoke at work”

Gud•24m ago
Correlation does not imply causation. Society has bigger problems(probably).
gunsle•14m ago
I live in MN where it’s effectively been decriminalized for years. I believe 100% it has had extremely negative effects on the general populace. I see it in myself and all of my Gen Z/millennial friends that smoke regularly. The amount of money I’ve wasted alone on weed is frankly disgusting, and it’s not looked down upon like it would be if I was at the liquor store every other day blowing my paychecks.

Agreed completely on the day drinking point. That’s actually what got me to quit initially years ago. I realized, would I be drinking right now before work? Hell no. So why am I okay with getting high?

andreygrehov•1h ago
My biggest complaint is the smell. I absolutely hate it. The smell is strong and spreads everywhere. Some people in our community smoke marijuana while walking their dogs. At the same time, my wife takes our newborn for a walk. It’s absolutely unacceptable.

Edit: down-voters do not allow me to dislike the smell. Hilarious! I'm at -2 now. Nice! I get it, i get it. I must love it.

chaostheory•1h ago
Yeah, people need to switch to edibles as a courtesy
codybontecou•1h ago
That's just smoking in public. It's an issue regardless of what's being smoked.
andreygrehov•1h ago
Not really. Regular cigarette smoke is less intense and dissipates pretty quickly outdoors. Marijuana smoke is much stronger, lingers longer, and carries farther, so it impacts everyone nearby a lot more.
ndsipa_pomu•53m ago
It's not nearly as ubiquitous as car exhaust fumes/tyre wear pollution which I find to be a lot more objectionable as it's far more dangerous to us.
andreygrehov•45m ago
Classic whataboutism. The existence of problem A doesn’t cancel out problem B. Car exhaust being harmful doesn’t suddenly make strong marijuana smoke in public acceptable, especially around kids.
ndsipa_pomu•15m ago
I don't think it's whataboutism to point out the far bigger problem. There's evidence to show that vehicle pollution leads to respiratory issues in children and certainly reduces life expectancy. Meanwhile cannabis smoke has not been shown to have anything near that level of toxicity and is certainly less common.

It hardly makes any sense to focus on the far smaller issue that doesn't seem to cause any issues apart from pearl clutching.

andreygrehov•9m ago
The problems can and do co-exist. The list is endless and that's why it's whataboutism.
AndrewKemendo•1h ago
I started medical cannabis at 38 after leaving the military and it has been completely transformative for my Epilepsy/PTSD/CPTSD/arthritis and all of the other bullshit that came from being in the military for 17 years

100% of my doctors say (incl. Director level at Mt Sinai and orthopedic surgeons for the Washington commnders) are more than delighted with my prescription

so like that’s just your opinion man

hackboyfly•56m ago
Ha +1 for the Lebowski reference.
mhitza•59m ago
My impression was that it is a well known fact that canabinoids help with neurogenesis. Random article on topic https://www.frontiersin.org/journals/behavioral-neuroscience...

But maybe its a pop-science kind of fact that I've been carring along all this time without factuality?

gunsle•12m ago
I can tell you from years of first hand experience, it certainly makes you far dumber. The biggest factor is loss of memory. Most stoners (myself included) have terrible memory. I used to have near photographic memory, where I’d only have to read things once to remember them nearly verbatim for months after. I genuinely wonder at times where I’d be in my life if I had never got sucked into it years ago. I’m doing great despite the problems it’s caused me, but who knows where I’d be without it.
stingraycharles•48m ago
I’m not going to comment on the gateway drug part, but I definitely agree that - as someone who has consumed cannabis daily for about 30 years now - that I always smirks when only positives are being highlighted.

It definitely has negative effects long term. Concentration is impacted. In my case, it can cause anxiety. The impacts are subtle, but they’re there.

The negative side effects are definitely being underrepresented at the “non-scaremongering” parts of civilization.

Gud•25m ago
Regarding anxiety,

Have you tried blending in CBD?

Typically I smoke small joints with 90% CBD strains and the rest a high THC strain, only thing I can smoke.

gunsle•20m ago
I think weed is actually far more insidious than most drugs, because it’s incredibly easy to be a functional stoner. The downsides don’t start to appear until you’re years down the road, and often the marijuana haze keeps you from fully evaluating just how detrimental those downsides have been on you. At that point, you’re legitimately addicted, and your brain begins to sweet talk any attempt at rationality.

For me, the downsides manifest as drarticlsly increased anxiety (I naturally have next to none), extremely poor sleep - I sleep but the sleep is so low quality it begins to feel like my brain barely works right, and the obvious one, the effects on your motivation. I naturally tend towards ADHD style dopamine chasing, and weed makes that about 100x worse. Instead of getting my work done, I will procrastinate with any number of cheap dopamine hits such as video games, internet sleuthing, etc.

master-lincoln•43m ago
How would it clearly be a gateway drug? I don't think this concept even makes sense. Sure if contact to X also brings you in contact with Y, you could see X as gateway to Y. But what contact to other drugs you have depends on where you acquire the Marijuana. If I home-grow I see none. In a pharmacy I need prescriptions to access their other drugs, so also not a gateway. It's only problematic when acquired via dealers who also sell other stuff. When I tried buying weed on the street, vendors didn't offer me other drugs.

I agree with your other points though.

gunsle•23m ago
I mean in my case, I never even considered drugs until I started smoking weed in college. So it was definitely a gateway drug for me. At first glance, weed has little to no noticeable downsides. This made me think that the other drugs must be the same way. It led me into a drug abuse phase of my life that I still struggle with. Prior to that, I barely did drugs at all and had no real inclination to do so.

I think part of it is the crowd you end up in when you smoke weed. Unsurprisingly, drug use lends itself to putting you in situations with other drug users. These users often completely ignore, leave out, or outright lie about the downsides of these drugs, from chronic weed use to LSD.

arduanika•1h ago
Dude, but what about like, correlation versus causation, man?
blitzar•1h ago
Looks like I picked a bad day to give up cannabis.
swed420•1h ago
Moderation as found in /r/petioles is a middle ground that works for many people
sfc32•1h ago
They don't call it "dope" because it makes you smarter
throwfaraway4•1h ago
Define "smart". "Your bring gets smart but your head gets dumb" - Smash Mouth
ndsipa_pomu•43m ago
But they (or at least Harry J Anslinger) did make up the name "marijuana" just so that it sounds vaguely Mexican/Spanish in an attempt to link racism and drug enforcement.
spongebobstoes•1h ago
this is not a good study. it says that most cannabis use occured when young, and they then measure brains and cognitive test performance when older

this feels like reading tea leaves

PlatoIsADisease•1h ago
What is the point of having a study published in a journal when no one can read it? Creds?

It has no cred to me unless I can read it. Appeal to authority is the opposite of science.

Anyway, sounds like induction, it might be probabilistically true, but they don't have the theory to prove it. (Popper ruined me)

nyeah•1h ago
Cannabis usage is linked to self-reported better cognitive function. But some new studies suggest it's not wise to do technical interviews while baked. Nobody can explain this paradox.
jacquesm•1h ago
Let me counter this with all of my anecdata: I don't know a single pothead that improved compared to who they were (mentally especially, including cognitive function) compared to when I knew them before they started smoking pot. I'm sure they exist, I have not met them in person yet.
AndrewKemendo•1h ago
You know at least one

Hey buddy

jacquesm•20m ago
Technically, not in person ;)

I know lots of people that smoke heavily and I've watched their trajectory over decades. It's a sad story really. I'm pretty sure if you manage it responsibly the benefits may well outweigh the downsides but over the long term it really adds up.

Of course, everybody ages, and people are not usually as sharp as they were in their twenties or earlier. But given that I also have access to a sizeable control group where I don't see that effect I figure it has to have some factual basis too large to be just handwaved away.

Feel free to correct the fact that we haven't met in person by the way, you & yours are always welcome here.

Schmerika•57m ago
I've seen many. There are no shortage of successful people who say so themselves.

Read what any of your favorite musicians have to say about it. Check the science and testimony on it enhancing creativity and sensory experience, helping people see see themselves and the world from a new perspective - introspective development.

You know, the same sort of introspection that might make one wonder if your statement above says a lot more about you, and your values, than it does about cannabis enjoyers.

swed420•54m ago
Carl Sagan was one example:

https://thereitis.org/mr-x-by-carl-sagan/

He originally wrote about it under a pseudonym for fear of professional consequences. Many such cases.

lo_zamoyski•23m ago
Analogous to Dunning-Kruger. The drug user only perceives his experience as profound, but the perception is measured by a mind poorly positioned to judge the experience.
jacquesm•18m ago
> There are no shortage of successful people who say so themselves.

Yes, I know some of those. But usually they are either very light users or they achieved their success before becoming heavy users.

I also know some pretty heavy users that are adamant that they are doing better than before but their environment does not usually agree. This is a thing that is fairly common with heavy drug users though.

daft_pink•1h ago
Is this causation or correlation?
ifwinterco•34m ago
There actually is a plausible mechanism here: various cannabinoids are anti-inflammatory and reduce excitotoxicity in the brain.

On the margin, this should reduce the risk of some brain diseases as you get older.

However as much as I love loud there are obvious downsides to daily use

eudamoniac•3m ago
I enjoy a good edible now and then, but this sounds like every popsci study that fails to reproduce.

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