frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

fp.

Start all of your commands with a comma

https://rhodesmill.org/brandon/2009/commands-with-comma/
142•theblazehen•2d ago•42 comments

OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
668•klaussilveira•14h ago•202 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
949•xnx•19h ago•551 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
122•matheusalmeida•2d ago•32 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
53•videotopia•4d ago•2 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
229•isitcontent•14h ago•25 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
16•kaonwarb•3d ago•19 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
222•dmpetrov•14h ago•117 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
27•jesperordrup•4h ago•16 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
330•vecti•16h ago•143 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
494•todsacerdoti•22h ago•243 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
381•ostacke•20h ago•95 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
359•aktau•20h ago•181 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
288•eljojo•17h ago•169 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
412•lstoll•20h ago•278 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
19•bikenaga•3d ago•4 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
63•kmm•5d ago•6 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
90•quibono•4d ago•21 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
256•i5heu•17h ago•196 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
32•romes•4d ago•3 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
43•helloplanets•4d ago•42 comments

Where did all the starships go?

https://www.datawrapper.de/blog/science-fiction-decline
12•speckx•3d ago•4 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
59•gfortaine•12h ago•25 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
33•gmays•9h ago•12 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1066•cdrnsf•23h ago•446 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
150•vmatsiiako•19h ago•67 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
149•SerCe•10h ago•138 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
287•surprisetalk•3d ago•43 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
182•limoce•3d ago•98 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
73•phreda4•13h ago•14 comments
Open in hackernews

Lithium compound can reverse Alzheimer’s in mice: study

https://hms.harvard.edu/news/could-lithium-explain-treat-alzheimers-disease
159•highfrequency•6mo ago

Comments

MaxPock•6mo ago
Things I love to read.

I went to visit my aunt one day, and my favourite uncle couldn't recognize me. It made me think that Alzheimer's is probably the worst thing that could happen to a person. I mean, what's worse than not being able to recognize those closest to you? You work a lifetime, and then you go out in such an undignified manner.

I pray for a cure in my lifetime.

outworlder•6mo ago
It's worse. Not recognizing people close to you is really hard on everyone else(including people taking care of you), but since you don't remember, it's not as bad for you.

You won't even remember whether or not you had lunch. I met a grandma that was distraught that nobody was feeding her and she was hungry. Except she had had lunch already but couldn't remember. You forget where you live so if you get out of the house you can't get back. And many have 'sundowning', they get scared if they are outside and the night falls. It's not just the forgetting either, you start losing fundamental functions and eventually die. Not to mention the aggression and mood swings, which are aggravated if you try to point out that they are forgetting things.

It's a terrible disease. You cease to be you.

groos•6mo ago
What most people don't realize is that Alzheimer's - and its friend FTD - are terminal diseases with life expectancy just as bad as many cancers. Hardly anyone makes it to 5 years after diagnosis. The bodily degeneration that eventually results in the patient being utterly unable to function is heartbreaking. Forgetting things is a relatively minor symptom. It's also terrible on the family members of the patient whose mental health also suffers along the way.
cubefox•6mo ago
> It made me think that Alzheimer's is probably the worst thing that could happen to a person.

Alzheimer's is slowly destroying the person, but this might in some cases be not as bad as diseases which leave the person in place but make them suffer intensely, e.g. from pain or depression. Though it's hard to compare.

a5c11•6mo ago
I'll take pain over slowly reversing to fetal brain development. My grandma had it, and it was freaking sad to watch her lose all body functions. I've already made a decision that when I spot first symptoms, and there won't be a cure, I'll finish all my earthly stuff, and will buy some good morphine.
switchbak•6mo ago
> It made me think that Alzheimer's is probably the worst thing that could happen to a person

I've had relatives die of Alzheimer's, and others die from other causes. Let me assure you that there are worse fates than the one you describe.

prmph•6mo ago
worse than familial insomnia?
chevalier_1222•6mo ago
guess I'll add phone batteries to my diet
modeless•6mo ago
Lithium orotate is available over the counter. People could try it today.

> Since lithium has not yet been shown to be safe or effective in protecting against neurodegeneration in humans, Yankner emphasizes that people should not take lithium compounds on their own

I reject this kind of blind safetyism. A cursory search suggests that lithium orotate has been used for decades, and the article suggests that "profound effects" were seen at an "exquisitely low dose" which should be safe. They're going to need a much better explanation of why people shouldn't try it.

adamgordonbell•6mo ago
People use it in much smaller dosages then it's usually prescribed to apparently beneficial effect.

I believe its also in the water supply in certain places, so if it works for dementia there are natural experiments already running on this.

https://www.psychiatrictimes.com/view/low-dose-lithium-a-new...

cypherpunks01•6mo ago
Yes, it's already thought that there's an association between naturally occurring lithium in drinking water and decreased suicide rates:

https://www.cambridge.org/core/journals/the-british-journal-...

I would think naturally occurring lithium in some people's water would give pretty good control conditions to do a wide study of this effect on Alzheimers as well?

Mistletoe•6mo ago
This is fascinating, thank you.
valianteffort•6mo ago
The addition of flouride to tap water supply likely affects brain development. Let's not go adding lithium too.

These things are simple enough to advise the populace to use on their own. The government should never play nanny, ever.

ikr678•6mo ago
Is advising people to wear sunscreen and not speed also nannying? If the government ultimately bears the costs of poor health of citizens, why shouldnt they embark on public health interventions to lower those costs.
valianteffort•5mo ago
The government should not be bearing that cost. It is idiotic to ever put the state in charge of people's health.
zius•5mo ago
Clearly, the best system is the one where you spend the most to get less /s
victorbjorklund•6mo ago
And crime in general.

https://pmc.ncbi.nlm.nih.gov/articles/PMC7576670/

twojacobtwo•6mo ago
(for others like myself)

Results

The literature search identified 415 articles; of these, 15 ecological studies were included in the synthesis. The random-effects meta-analysis showed a consistent protective (or inverse) association between lithium levels/concentration in publicly available drinking water and total (pooled β = −0.27, 95% CI −0.47 to −0.08; P = 0.006, I2 = 83.3%), male (pooled β = −0.26, 95% CI −0.56 to 0.03; P = 0.08, I2 = 91.9%) and female (pooled β = −0.13, 95% CI −0.24 to −0.02; P = 0.03, I2 = 28.5%) suicide mortality rates. A similar protective association was observed in the six studies included in the narrative synthesis, and subgroup meta-analyses based on the higher/lower suicide mortality rates and lithium levels/concentration.

cubefox•6mo ago
> They're going to need a much better explanation of why people shouldn't try it.

Clinical trials need many participants and take a long time, and they require a control group which doesn't take lithium orotate. Finding these people might be hard if everyone is taking it anyway.

wonderwonder•6mo ago
So if after a long time its proven that it does prevent Alzheimer's, was the deaths of everyone that would have been taking lithium to prevent it due to this anecdotal article worth it?

Would you be willing to die of Alzheimer's in order to serve as a placebo for the control group? What about your parents?

I don't really understand this mindset.

I already ordered 5mg tablets of lithium orate as soon as I read this. I'll just add them to the handfuls of other supplements I take each day just in case they may protect against common degenerative ailments.

I very much adhere to the better safe than sorry or yolo approach to supplementation.

Angostura•6mo ago
> I don't really understand this mindset.

It's called evidence-based medicine and it's useful for answering questions such such as 'with taking Lithium prevent Alzheimer's by ensuring you die of kidney disease first.

Taking a bunch of unnecessary supplements isn't inherently "safe".

wonderwonder•6mo ago
Low dose lithium is not going to cause kidney failure. I was also responding specifically to OP advocating for people to intentionally not to take it so there is a ready supply of people to test it on who are not already on it for a long period of time (decades). They are advocating for self sacrifice.

This by default means there must be a large supply of people not on it for a long period of time who will suffer and die from Alzheimer's instead of just taking the supplement. That was my issue. It seemed to call for the self sacrifice of many in order to allow for a long term study. But I think you already know that if you read my response and just chose to focus on a single sentence.

cubefox•6mo ago
The alternative to a clinical trial would be that there continues to be much less certainty whether lithium orotate actually works and is safe. Which would result in less or more usage than optimal.
wonderwonder•6mo ago
I will ask you the same question I asked OP

"Would you be willing to die of Alzheimer's in order to serve as a placebo for the control group? What about your parents?"

Since that is essentially what you are asking the people that would have ordered low dose lithium based on this article to do.

cubefox•6mo ago
Well I was the OP. It might be a tragedy of the commons situation. For each individual it may be better to ignore trials and just self medicate, but on the whole this could lead to an overall worse outcome in the long run.
wonderwonder•6mo ago
Ha! you were op, my fault :)

Although that means you avoided answering my question directly multiple times although I think you strongly alluded that the answer would be no in your last response.

I look at my life and those of my family as precious and more valuable than all other lives (their lives over mine). I expect others to operate in a similar manner and that is why I am always taken aback at posts that seem to advocate for the sacrifice of one's self for the benefit of strangers. This is different of course from in the moment actions such as running into a burning building to save someone or stepping up to protect a woman you have never met from an aggressive man.

Your response while vague appears to indicate that you would not sacrifice yourself for this experiment either. Which is what I would expect from everyone.

I understand your general advocation for the clinical study and I agree with the need overall but not at the cost of intentionally sacrificing oneself.

So I'll pop a low dose lithium tablet along with a baby aspirin each night and hope you do the same. Wishing you a long life my friend.

bawolff•6mo ago
> So if after a long time its proven that it does prevent Alzheimer's, was the deaths of everyone that would have been taking lithium to prevent it due to this anecdotal article worth it?

And if it actually makes Alzheimer's worse?

We are talking about a mouse model of a disease that very famously doesn't work the same way in mice and humans. The most likely scenario is it does nothing. With this level of evidence you might as well just eat random garbage off the ground in the off chance it helps.

wonderwonder•6mo ago
Probably nothing

https://pubmed.ncbi.nlm.nih.gov/31954065/

"Conclusion: Individuals with BD [Bi Polar Disorder] are at higher risk of dementia than both the general population or those with MDD. Lithium appears to reduce the risk of developing dementia in BD."

vczf•5mo ago
5mg may be an order of magnitude more than needed.

I started my father [0] on ≈200ug and he was more animated and looked at photos around the house much more. Bumped him up to ≈500ug [1] the last two days, and he’s shown a nearly unbelievable improvement in lucidity and recognition.

He’s still nonverbal but babbling a lot more, and in a non-agitated way. He’ll make eye contact with us more and wiggle his eyebrows. He has not been running away from me during morning yogurt and other meals we sometimes have standing up. More responsive to music, photos, eye contact.

He actually kissed my mom today and then got teary-eyed. He hasn’t done anything like that in at least a year.

Tonight when he was tired, he wasn't unstoppably wandering. He was tired but still “there” and lucid. I was able to calmly walk him to his bedroom.

Lithium orotate might be the magic bullet. Lithium deficiency could very well be the cause of age-related neurodegeneration. It’s too early in my personal case study to draw firm conclusions, but this is looking absolutely incredible from my perspective as a caregiver. Subjectively, he seems no longer “lost” in the darkness.

If he is still stable and/or improving in a month, I will be making as much noise about this treatment as I can online and in meatspace. [2]

[0] Early onset posterior cortical atrophy and corticobasal degeneration. It presents initially as visual disturbances, hallucinations, and coordination problems rather than memory loss. Sometimes memory and speech can persist until the end.

[1] I opened up some 5mg Nutricost capsules, weighed the contents, and calculated how much of the mixture is needed for a given amount of active ingredient. Then I measure out each dose on a calibrated milligram scale. This is definitely out of reach for many people, so ideally companies can just add a small dose to multivitamins and call it a day. I’ve been taking the same dose I give my dad, and have not noticed much of anything.

[2] There are some ethical considerations in halting the disease process for those with late stage dementia. It would be inhumane to “cure” advanced AD if one has no hope of a life worth living, given one’s current capabilities and options. (For example, bed-bound in nursing homes with severe memory loss.) I’m very optimistic about lithium orotate, but I doubt it can do more than halt the neurodegeneration—which would mean rapidly hitting a low ceiling for cognitive improvements after beginning the therapy. That also means a practically life-long caregiving requirement. I didn’t want to be a caregiver for my father for the next 30+ years, but frankly I did not expect such a dramatic and immediate improvement in his condition. I expected nothing at all to happen.

jsbisviewtiful•6mo ago
> I reject this kind of blind safetyism.

You said you searched to learn more about lithium, but somehow missed that it's highly recommended to be administered by doctors due to side effects after long term use. Anything that damages your kidneys or thyroids can kill you, so calling it "blind safetyism" is silly.

rogerrogerr•6mo ago
It’s blind safetyism when an article writes “don’t do this because no one has proven it is safe”. Most people will read that as “you can probably do this but in the off chance something bad happens, I wrote these words so you have a harder time suing me”.

It would be more useful and effective for the article to say “don’t do this to yourself because it can damage your guts, see these links, there’s tradeoffs here”

The former just fades into the modern world’s background noise of unchecked ass-covering.

CoastalCoder•6mo ago
> The former just fades into the modern world’s background noise of unchecked ass-covering.

The missing piece of this argument is just what the probability of different legal risks is here.

Wether or not their ass-covering is reasonable hinges on that and on their risk tolerance.

rogerrogerr•6mo ago
Oh, it’s rational for them! That’s the problem - it’s always rational to treat anything you write as the highest level of liability. No one loses money by adding more disclaimers. Observe:

Drinking water is a good idea.

*check with your doctor if you are allergic to water, have a history of drowning, or are unable to distinguish water from ethanol. Do not consume water while intubated. People with rabies may have adverse reactions to water. Use caution when drinking water if you cannot swallow or are currently vomiting. Water from some sources may be contaminated. Salt water may contain jellyfish.

—-

My legal exposure from the initial statement went down with every little stupid disclaimer I added there, and there’s no penalty for each one. But you probably didn’t even read the full thing. We’ve created a culture of everyone feeling like they need to cover their ass, and the real important things get drowned out.

tgv•6mo ago
Especially since mice are not really perfect models for humans. For starters: these mice were "12 to 24 months of age", whereas your typical Alzheimer patient is well over 30 times that. The article also links it to amyloid plaques, which is a contested hypothesis that may well have held back Alzheimer research for decades. To be fair, the article seems to look at more mechanisms, but that's well beyond my expertise.
modeless•6mo ago
12 to 24 months is old in mouse years. And the article offers a plausible explanation for both why plaques could cause the disease and why clearing them alone might not fix it without lithium supplementation.
hollerith•6mo ago
The kidney damage, etc, are consequences of the very high doses of lithium needed to control bipolar disorder.

Most experts who have been recommending lithium supplementation to support general health recommend doses about 100 or 300 times lower.

modeless•6mo ago
Exactly. An "exquisitely low dose" should be safe. And Alzheimer's also kills you, after making life no longer worth living. For people who already have it, I don't see any reason why they shouldn't try an appropriate dose.
inejge•6mo ago
> An "exquisitely low dose" should be safe.

The problem is that a subset of self-experimenters have the mindset "the more, the better" -- I still remember the Covid-era vitamin D discussions, with people openly reporting taking stupendous daily doses. (Lithium and vit. D are not in the same category, but you'll recognize the approach.)

So someone goes overboard, maybe damages their health, and traces it back to an article without the caveat. Lawsuit time! We're talking about fractions of a percent here, but with a wide enough potential readership you have a non-trivial chance of a hit. Common sense doesn't work at scale. Hence the CYA rhetoric.

tokai•6mo ago
>it's highly recommended to be administered by doctors due to side effects after long term use

This is at a clinical dose which is somewhat high. It is the dosage fund reliable as treatment for bipolar type 1. As long as you get your kidney numbers checked twice a year, at that dose, its mostly unproblematic as issues show themselves in the numbers before major damage.

QuantumGood•6mo ago
When I started giving injections to a family member, I learned many things can cause problems that I didn't know about, such as that very tiny bits can break loose from the bottle top and cause issues. "Blind safetyism" is a point of view that can be more popular with certain personality types, but I think it's often a good starting point for research.
thisislife2•6mo ago
To add to what the parent comment said - Lithium is also prescribed for some mood disorders. So if you are thinking of self-medicating with it please be aware that it can mess with your brain chemistry too.
hn_throwaway_99•6mo ago
Lithium orotate has been available as a supplement for decades and hasn't shown adverse effects. Here is a study from a few years ago that also showed no harmful effects from lithium orotate: https://www.sciencedirect.com/science/article/pii/S027323002...
wonderwonder•6mo ago
I ordered 5mg tablets of Lithium Orate 5 minutes after reading this article on X. I take EGCG as well due to a similar article.
alphazard•6mo ago
The error in "safteyism" isn't that the conventional wisdom will incorrectly identify safe things as dangerous. It's that risk and reward always exists on a spectrum, and the people best incentivized to get that tradeoff right are patients and caretakers, not concerned 3rd parties.

The error of the concerned 3rd party is particularly egregious with a disease like Alzheimer's, which presents a significant risk of ruin in the form of information death. It is totally rational to use an intervention that will cause you significant harm if it preserves your mind another few years.

lawlessone•6mo ago
I've heard of suggestions that it should be added to water(in low doses of course) to see it reduces suicide rates.

I like the idea but can only imagine the anti-flouride crowd would freak out.

Aurornis•6mo ago
I tried the low-dose lithium orotate supplements and the net effect was apathy and reduced motivation. Not everyone experiences this but from searching I’m not alone.

Definitely not something to start pouring into the water supply.

ianmcgowan•6mo ago
That's exactly what the Lizard overlords are doing! /s - wouldn't be surprised there's a few conspiracy theorists who believe this...
burnt-resistor•6mo ago
> apathy and reduced motivation

Shit, that's my baseline. I'd pay for supplements that produced the opposite effect, even by placebo. In the meantime, I'll continue trying to Jedi mindtricking myself into caring, motivation, and productivity.

justinclift•6mo ago
Vitamin D? :)
amanaplanacanal•6mo ago
Pulling this out of my ass, but lithium is associated with weight gain, and has been suggested to be a possible causative agent on the obesity epidemic. (Extremely low confidence on this one)
burnt-resistor•6mo ago
I can no longer sit back and allow Communist infiltration, Communist indoctrination, Communist subversion, and the international Communist conspiracy to sap and impurify all of our precious bodily fluids.
zingababba•6mo ago
I've played with it on and off for years from 1mg up to 10mg a day. It's a drug I definitely 'feel' when I'm not saturated. I initially became interested in it due to this -> "Since vitamin B12 and folate also affect mood-associated parameters, the stimulation of the transport of these vitamins into brain cells by lithium may be cited as yet another mechanism of the anti-depressive, mood-elevating and anti-aggressive actions of lithium at nutritional dosage levels.” (https://pubmed.ncbi.nlm.nih.gov/11838882/)

It does reach a point of diminishing returns for me and I become too sedated. I now take it irregularly.

connicpu•6mo ago
My spouse was prescribed lithium by doctors and it messed up her thyroid, it's not a drug to be taken lightly.
vczf•6mo ago
Sure, but the amount and form of the lithium matters. 5mg of lithium orotate (as a supplement) versus 600mg lithium carbonate (as a mood stabilizer) will have vastly different acute and chronic health effects.
renecito•6mo ago
yup, because this could not be a scam.

You are free to try it, it's over the counter, no one is oppressing you here, Darwin is your friend.

nyeah•6mo ago
"They" are just some people who did an experiment on mice. They don't know the effects on humans. It sounds like you think you know more than they do. Ok.

A paper is not like a religious commandment or something. It's, best case, some mortals honestly trying to learn something. Scolding them for admitting the limits of their knowledge is not reasonable.

UncleOxidant•6mo ago
The comment I see right above yours says "there is no reliable Mouse Model for Alzheimer's." So it's certainly not a slam dunk that taking OTC lithium orotate is going to prevent Alzheimer's. Maybe it'll work? (but you won't know for decades) And maybe it's safe as long as you don't exceed the recommended dose, but there can be interactions with other meds you might be taking (some diuretics will cause you to concentrate lithium, for example).
Aurornis•6mo ago
I tried Lithium Orotate at the typical supplement dose. After the first week it left me feeling rather blah. Discontinuing it reversed the feeling after a few days.

I repeated this a couple more times with a repeatable outcome.

It’s very hyped in supplement communities with claims that it’s perfectly safe and side effect free. I didn’t get any kidney damage or anything, but I also didn’t get a positive benefit from it. Only subtle negatives that built up over a week.

leoh•6mo ago
Not for you, then, right? Pretty normal for many medicines, supplements, etc. I think it’s cool we can try things (even if they don’t always work).
Aurornis•6mo ago
This is typical of a lot of supplements: The benefits are touted as near magic and the negatives are completely dismissed. Then people try it and discover either no effect or end up with side effects.
Nifty3929•6mo ago
Indeed!

Sure, maybe lithium orotate can be bad in high doses.

You know what's super-bad for sure? Alzheimer's!

If I have Alzheimer's, please let me try whatever long-shot you have. I'll be your gunnie pig.

hn_throwaway_99•6mo ago
Completely agree. The other thing that was very encouraging about the study is that it actually reversed memory decline - it's not like you needed to take it for years/decades in advance to prevent that decline in the first place, so you can make the choice when the risk/reward tradeoff is much clearer.

Having seen a few family members succumb to dementia, it's not a path I want to take. Fuck up my kidneys and give me an early death, fine, but if I start showing the signs of that type of mental decline, I'm taking the lithium orotate.

My related biggest concern about this is that since it's a cheap supplement that can't be patented, it won't be a priority for the drug industry to study. Another reason to not necessarily trust the "Just slowly die by Alzheimers until we find the perfectly safe (patentable) antidote" crowd.

burnt-resistor•6mo ago
Next, on Chubbyemu ...
phkahler•6mo ago
Lithium-6 if I recall correctly was the preferred isotope (for the brain, not this study). I don't recall why.
ninetyninenine•6mo ago
Lithium is a strange drug. It also cures bipolar disorder and nobody knows why. It also fucks up the liver over time and basically people on lithium eventually have to make a choice between dying or being insane.
bink•6mo ago
Surely the minimal dosage they're studying here won't have such dramatic impacts on the liver? It's basically what's available in some water sources. It's also available in food sources like leafy greens, nuts, and legumes.
exmadscientist•6mo ago
It's mostly the kidneys that get damaged, not so much the liver. It also has a massive amount of benign or merely annoying side effects. Lithium might even be the drug with the largest overall amount of side effects. It's certainly a weird one.

High-dose lithium is extremely hard on your kidneys and may well lead to kidney failure in a decade or so. Medium-dose lithium is a lot more gentle but still requires monitoring. Many people can go down in dose after initial treatment, and good psych prescribers will attempt to do this after a while. (Or patients will request it, after the other side effects of lithium become noticable after the bipolar has settled down.) Low-dose lithium is much harder to study and may well be pretty safe. May.

It is not quite true that people have no idea how it cures bipolar disorder. It's definitely affecting the ion channels (sodium, potassium, etc), just like many other anticonvulsant drugs also used for treating bipolar. So the mechanism for action is not totally insane and unique. Now, why the ion channels are the place to go for certain people, that's an open question....

dboreham•6mo ago
> Now, why the ion channels are the place to go

Personal theory: these things are like "global constants" for the brain's GPU. Somewhat similar to the temperature constant in an LLM. There is no real "explanation" for why they work, they just have an effect. Various chemicals have various effects, often depending on the patient (because other constants vary, training data varies...) and we pick the chemical we like the effect of most.

owenversteeg•6mo ago
I have to say that I think the current popular idea of "we know how X drug works in the body because it does Y to Z" is patently insane. It may be useful information, sure, but it's not really _why_ it works, because we don't understand how the body works. It would be like Toyota saying: "the Corolla works on gasoline because it burns inside the engine, but we have no idea why the engine breaks when you put acetone in it." It would be obvious that Toyota had no goddamn clue what was going on in the engine! And yet, that's exactly where we are with most drugs including lithium; most of these so-called mechanisms would work on rubidium, so why does rubidium have different effects? Who knows!

If you read a literature review for lithium's mechanism of action, it's a wild ride [0] that clearly demonstrates exactly how little we know. More importantly, though, is that all of this is made up ex post facto. Nobody can take a _new_ drug and tell you anything concrete about what it will do or how it will work: instead, we look at what happens and _then_ we make crude guesses. It is essentially modern miasma theory. For those who have forgotten, the application of miasma theory built our first sanitation systems, which eliminated more deaths from disease than the entirety of vaccines. That is to say: just because we are groping in the dark does not make the work useless, and indeed, our first vaccines were also constructed with very primitive methods.

I think that a more concrete understanding of the human body can only come when we start to understand all the many pathways of life in/on/around the body. Right now, our technology constrains us to investigate only individual points in mostly static ways. Give it a few decades of advancement and I bet we'll have some fascinating insights. I would also bet that, as with any complex system, there will be no simple answers to how things work.

-----------

For what it's worth, in the specific case of lithium, the American Society of Health-System Pharmacists would agree with me that the mechanism of action is unknown: https://www.drugs.com/monograph/lithium.html

[0] https://link.springer.com/article/10.1007/s40263-013-0039-0

exmadscientist•6mo ago
That monograph is not appropriate to this discussion because it is written for practitioners, not researchers. There is plenty of information on some of the things lithium is doing. My point was not "we have a complete understanding", but "we have some idea what is going on here, but there is still a lot we don't know".

Lithium is one of a large class of drugs that modulate the chemical potentials of the body's voltage-gated ion channels. There are a lot of drugs in this class, and most have been used with at least some degree of success to treat bipolar disorder. This class is also first-line treatment for many forms of epilepsy. The GABA system is directly tied in here too, and GABAergic agents are generally considered part of this class... and, guess what, they often help in bipolar as well. Lithium is a unique member of this class, and it is completely obvious (to a biochemist) that adding another species of alkali metal in sufficient concentration will disrupt the chemical potentials of sodium and potassium ion transport in the ion channels.

My point is: the first-level effect of lithium is well understood, and it affects an area that is well known to be affected by other drugs that have similar effects. So it is not total voodoo. However, you are also very correct that our understanding starts to break down after this. We can come up with new ion channel modulating drugs, and can reasonably expect them to be effective candidates for helping bipolar patients. What we cannot do is predict other targets or classes of drugs that might be interesting. That is where our understanding breaks down.

owenversteeg•6mo ago
I'm not sure why the relevant portion of the monograph isn't appropriate simply because of the target audience. "Alters sodium transport in nerve and muscle cells and effects a shift toward intraneuronal metabolism of catecholamines, but the specific biochemical mechanism of lithium action in mania is unknown" is the general consensus on lithium whether you're reading it as you, me, or Donald Duck.

Here is where we can both agree: we know a few things about the mechanism, which allow us to make some useful judgments in a few limited cases. We can also both agree that we know so little that, if a new, similar drug were proposed, with only a small change to its chemical structure, neither of us would dare make any confident statements about its action. We also cannot accurately predict what would happen if given to a patient with a well-studied but different disorder. In other words: most of the useful judgments about lithium - those that would be economically or socially interesting, for example - cannot be made from the model, because our understanding of the mechanism of action is too crude.

All of that is also, however, true about my hypothetical Corolla from my first example: we can say a few things, but most of the useful judgments that could be made from a full understanding cannot be made. It would be obvious to anyone that we do not understand the Corolla. So why, then, would we claim to understand lithium?

funnym0nk3y•6mo ago
Lithium is far from the drug with the highest amount of side effects among psych meds. Take the first generation antipsychotics for example. They are nasty.

As a matter of fact, lithium patients aren't much worse off when it comes to kidney function. Especially with modern levels of around 0.6 to 0.8 mmols.

Lithium has many modes of action, ion channels like you said, but also GSK3 function, BDNF changes and many more. It even changes the DNA methylation.

exmadscientist•6mo ago
Sorry, yes, I meant "highest number" rather than "highest severity". Lithium being such a tiny single atom goes all over the place and touches all kinds of things, but not all that strongly on most of them.
hirvi74•6mo ago
That's quite a stretch. Lithium does not cure bipolar disorder nor is it effective in many afflicted. Also, Lithium is not the only medication for Bipolar Disorder, there are a double-digit number of alternative options.

Also, to my knowledge, we are not entirely sure why most, if not all, of the psychiatric drugs work. Plenty of hypotheses though.

funnym0nk3y•6mo ago
Lithium cures Bipolar the same way all the other psych meds do. They don't. They just manage symptoms. Like insulin does, or antihistamines, etc. A propper cure is rare in medicine.
nartho•6mo ago
I have (had?) a chronic skin condition called seborrheic dermatitis. It manifested as dry cracks over my lips and cheekbones exuding an orange/yellow liquid. It was itchy and looked absolutely disgusting. It would stay there for a few weeks and then come back in a few months. Treatment was cortisone which reduced the time it would but it would always reappear a couple of months later, it'd also lose effectiveness. Then my dermatologist prescribed a new lithium based treatment (Lithioderm) and after a first treatment, I got a couple of progressively smaller outbreaks, and it's never reappeared since then, it's been 20 years. I don't think we know how or why it works but I'm glad it did.
hirvi74•6mo ago
I have a different condition, but I gave up on topical steroids years ago. What you are describing, the rebound effect, from them essentially defeats the purpose of using them, in my opinion. The longer you use them the more damaging they become causing one to require long breaks, which again, often makes things worse/futile. Though in my case, I was flaring back up in a matter of a week or two, not months.
stivatron•6mo ago
Watch out, there's no reliable Alzheimer's mouse model.
stivatron•6mo ago
Watch out, there is no reliable Mouse Model for Alzheimer's. I was deeply involved with mouse models at some point before quitting my phd in neuroscience and I quite remember that.
kovek•6mo ago
Could you share some sources that show this to be true?
j_bum•6mo ago
Not a source, but the fact that we can treat AD in mice but not humans should demonstrate OPs point sufficiently.
themafia•6mo ago
Wild mice do not get AD. Even if you let them achieve old age they do not develop the same brain plaques or tangles that are linked to Alzheimers.

Even if they did you'd have to run huge samples then do post testing necropsies to see which mice had AD which which didn't, then filter your data, then try to find results in what remains.

Otherwise you can inject the mice with a chemical known to cause AD, which is not reliable on it's own, so you can get genetically modified mice which express _some_ of the known plaques and misfolds that are associated with human AD.

Animal testing is still, largely, a very unethical and cruel affair. AD testing in mice is especially fraught with hazard.

woeirua•6mo ago
If you believe the paper, the authors were able to create symptoms and plaques similar to AD just by reducing lithium levels in the diet of these mice.
xkcd-sucks•6mo ago
It's like kind of challenging to prove this kind of negative, and the supposed proof here comprises no more than pedigreed words on a page, but here consider the section "What constitutes a good model for AD?": https://sci-hub.se/https://www.nature.com/articles/s41583-01...
csaid81•6mo ago
Yes, but not only did they improve the memory of mouse models of Alzheimer's, they also improved the memory of older wild-type mice, which seems impressive to me. https://www.nature.com/articles/s41586-025-09335-x/figures/1...
leoh•6mo ago
> Lithium was the only metal that differed significantly between people with and without mild cognitive impairment, often a precursor to Alzheimer’s disease.

Not a causative finding in humans but darn interesting

WillAdams•6mo ago
A spring near where I grew up used to be considered a notable watersource, and was actively bottled and sold, with the marketing proclaiming the benefits of "Lithia Water" --- always wondered how trace minerals from wells and springs affects health, and how consistent the elemental content is from year-to-year.
nahikoa•6mo ago
Given that tens of millions people have been treated for bipolar disorder with Lithium Carbonate, shouldn't researchers have already seen a correlation with Alzheimer's in patients?
vczf•6mo ago
From the abstract of the paper:

  > Replacement therapy with lithium orotate, which is a Li salt with reduced amyloid binding, prevents pathological changes and memory loss in AD mouse models and ageing wild-type mice.
https://www.nature.com/articles/s41586-025-09335-x

Another source on lithium orotate:

  > LiOr is proposed to cross the blood–brain barrier and enter cells more readily than Li2CO3, which will theoretically allow for reduced dosage requirements and ameliorated toxicity concerns.
https://pmc.ncbi.nlm.nih.gov/articles/PMC8413749/
vczf•6mo ago
The important part is this: “a Li salt with reduced amyloid binding”

If cells in the brain are being deprived of lithium due to sequestration by amyloid beta plaques, then a bioavailable form of lithium that is resistant to sequestration may treat the pathology.

MarkusQ•6mo ago
Hold on a second here; how is the anion of a soluble metal salt going to affect what happens to the cation after they separate?
amluto•6mo ago
Quoting the paper:

> We reasoned that the electrostatic interaction of the Li ion with Aβ deposits would be a function of the ionization capacity of the salt, and that Li salts with reduced ionization might show reduced amyloid sequestration. To assess ionization directly, we measured the conductivity of 16 lithium salts. Inorganic Li salts, including the clinical standard lithium carbonate (Li2CO3, hereafter LiC), showed significantly elevated conductivity, indicative of increased ionization, relative to organic Li salts (P = 8 × 10−4; Fig. 5a and Extended Data Fig. 7a). Of the organic Li salts, lithium orotate (C5H3LiN2O4, hereafter LiO) showed the lowest conductance across a broad Li concentration range (Fig. 5a and Extended Data Fig. 7a) and was therefore selected for further comparison with the clinical standard LiC.

From my not-exactly-expert understanding: lithium is a teeny tiny cation, and it can form compounds on a whole spectrum from ionic to covalent-ish. The authors are observing that lithium orotate does not fully dissociate in water.

leoh•6mo ago
Definitely, good point
modeless•6mo ago
Lithium carbonate was tested and didn't help the mice at all because it was just absorbed by the plaques. The exciting thing is they found a form of lithium (already commonly available as a supplement) which is not absorbed by the plaques and showed a reversal of symptoms with P=0.00007. That's the kind of statistical significance I like to see in my medical papers.
wonderwonder•6mo ago
I was curious if there was any correlation, inverse or other between people with Bi-polar disease treated with lithium and dementia.

Seems like a good real world example that should prove out if lithium works as we know people with BD take it.

Turns out there is a study that says there is.

https://pubmed.ncbi.nlm.nih.gov/31954065/

"Conclusion: Individuals with BD are at higher risk of dementia than both the general population or those with MDD. Lithium appears to reduce the risk of developing dementia in BD."

Overall people with Bi-Polar have a much higher rate of dementia but lithium treatment appears to reduce that.

People treated with valproate instead (a mood stabilizer) do not enjoy the same benefit.

So I'll commit to adding low dose lithium to my daily supplements

amluto•6mo ago
Interestingly, the proposed mechanism seems consistent with the apparent small benefit of anti-amyloid antibody therapy: if amyloid deposits interfere with lithium uptake, then removing them could restore some lithium availability without doing anything about the underlying initial cause of insufficient lithium.
modeless•6mo ago
Well, it does something about the initial cause of the deficiency, but it doesn't fix the deficiency by itself.

Maybe if you took lithium carbonate after clearing the plaques then you would get a recovery. But if just taking lithium orotate instead comprehensively fixes the deficiency regardless of plaques, as it seemed to do in this study, then maybe we don't need to bother treating the plaques at all.

Can't wait for human trials!

cubefox•6mo ago
Unfortunately lithium orotate can't be patented. It's just a mineral salt. So pharma companies have no incentive to invest in either research or clinical studies.
funnym0nk3y•6mo ago
There are so many misconceptions about lithium wrt to the human body.

I don't know why so many people differentiate between lithium orotate and the lithium carbonate in psychiatry. Although they differ in absorption the active component is the lithium ion in both cases. Dosage is done according to lithium content, there are tables for converting from orotate to carbonate and back.

Then the effects of lithium orotate and carbonate can't be that different. And thus, above a particular dose blood monitoring is mandatory.

There are benefits of low dose lithium for sure. And the dosages in psychiatry have been on a steady decline. With lower doses come less side effects. It is definitly not the hammer of psychiatry that turns people into zombies or messes. It feels quite natural.

In addition the reduction of Alzheimers cases is not unique to lithium. Many meds cause Alzheimers rates in mentally ill people to decline to general population levels.

atombender•6mo ago
The reason the researchers chose ororate is that it has reduced binding to amyloid. I don't know whether that is also true of carbonate, just pointing out they chose that lithium salt for a specific reason.
ThinkBeat•6mo ago
The headline in the article from Harvard says "Could Lithium Explain — and Treat — Alzheimer’s Disease?"

The headline right now "Lithium Reverses Alzheimer's in Mice"

Those are two quite different statements. Someone should fix that.

stubish•6mo ago
If you don't rewrite the headline to include 'in mice', we have to scroll past pages of people throwing shade on the study by repeating 'in mice', as if this is something new or insightful about how medical research works. Until many readers add the 'therefore not humans' fallacy in their minds.