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Dehydration's role in learning and memory

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Re: Dehydration's role in learning and memory

#51

Post by alexwwang »

throwthrowuknow wrote: post #40
0xEF wrote: post #32

Earlier quoted context omitted.

Are we sure this is not just harmless and arbitrary information being parroted? Do we have verifiable sources other that anecdote? I find it hard to believe that there is just a single value for water intake across the massive biological spectrum that is humanity and expect to see a range when this conversation comes up. You're also getting water from foods, which I am sure is not being accounted for. Reminds me of t…

I’ve always been extremely suspicious of constant water consumption. No other mammal seems to do this. Even the ones that require a lot of water like horses will only drink when they’re thirsty or while eating.

The point is you shouldn’t wait to drink until you feel thirty. That’s too late. Your muscle has been consumed by then.

Re: Dehydration's role in learning and memory

#52

Post by 0xEF »

Arodex wrote: post #46
0xEF wrote: post #32

Earlier quoted context omitted.

Are we sure this is not just harmless and arbitrary information being parroted? Do we have verifiable sources other that anecdote? I find it hard to believe that there is just a single value for water intake across the massive biological spectrum that is humanity and expect to see a range when this conversation comes up. You're also getting water from foods, which I am sure is not being accounted for. Reminds me of t…

Overdrinking water is an American mania. You don't need to drink 3 liters. https://abcnews.com/Health/Wellness/waterlogged-america-drin... The European doctor quoted certainly said "3 liters" from both drinks and food (especially vegetables). In Europe I think we drink between 1 and 2 liters per day in actual water, depending on how dry the weather is.

Agreed. Being in the Midwest US, my intake also varies widely, depending on weather or season, physical activity, and the foods I've been eating.

I'm not entirely dismissive of doctors, be they European or American, as most I've encountered do have the patient's best interest at heart. But they are also human, and it is very easy to stick with the safe and easy answer rather than do the work to find the real answer. So when I hear claims like that, I immediately doubt them, assuming it is placeholder information because we do not know the actual answer. Unfortunately, a lot of our media in the US considers such "placeholder information" to be actionable, and ends up convincing the public (including doctors) of its veracity.

Re: Dehydration's role in learning and memory

#53

Post by sevenzero »

solumunus wrote: post #29
sevenzero wrote: post #18

Earlier quoted context omitted.

Yea 2.5-3l seems to be the proper amount. Only drawback is having to pee every 30 minutes.

If you're peeing that much then evidently your body is not using all that water you're consuming. Either it's more than you need, or you're lacking in electrolytes and should increase electrolyte intake alongside the water.

By that logic, if I drank the right amount of water with 100% accuracy for multiple days, I'd only have to pee every few days.

Re: Dehydration's role in learning and memory

#54

Post by chocrates »

Arodex wrote: post #46
0xEF wrote: post #32

Earlier quoted context omitted.

Are we sure this is not just harmless and arbitrary information being parroted? Do we have verifiable sources other that anecdote? I find it hard to believe that there is just a single value for water intake across the massive biological spectrum that is humanity and expect to see a range when this conversation comes up. You're also getting water from foods, which I am sure is not being accounted for. Reminds me of t…

Overdrinking water is an American mania. You don't need to drink 3 liters. https://abcnews.com/Health/Wellness/waterlogged-america-drin... The European doctor quoted certainly said "3 liters" from both drinks and food (especially vegetables). In Europe I think we drink between 1 and 2 liters per day in actual water, depending on how dry the weather is.

Americans don't eat vegetables though

Re: Dehydration's role in learning and memory

#55

Post by chocrates »

throwthrowuknow wrote: post #40
0xEF wrote: post #32

Earlier quoted context omitted.

Are we sure this is not just harmless and arbitrary information being parroted? Do we have verifiable sources other that anecdote? I find it hard to believe that there is just a single value for water intake across the massive biological spectrum that is humanity and expect to see a range when this conversation comes up. You're also getting water from foods, which I am sure is not being accounted for. Reminds me of t…

I’ve always been extremely suspicious of constant water consumption. No other mammal seems to do this. Even the ones that require a lot of water like horses will only drink when they’re thirsty or while eating.

Tl;Dr blame Gatorade marketing.

The book "waterlogged" does a good takedown of the myth. Basically only you need to drink when you are thirsty.

Re: Dehydration's role in learning and memory

#56

Post by cess11 »

rambrrest wrote: post #33
riffraff wrote: post #5

The more I age the more important hydration turns out to be. Gastric issues, joint pain, blood pressure, weight problems, kidney stones, bad breath, constipation.. and now brain issues too? Do yourself a favor, and start drinking a ton of water!

Not too sure - an overload of water can actually be dangerous i think.

Water is poisonous in that too much of it will disrupt electrolyte balance and can be fatal.

It's one of the risks with taking MDMA, there are some documented cases where people died from drinking too much water when rolling.

Re: Dehydration's role in learning and memory

#57

Post by csomar »

deviation wrote: post #38
rambrrest wrote: post #33

Earlier quoted context omitted.

Not too sure - an overload of water can actually be dangerous i think.

Jumping in here with relevant experience - because you're absolutely right. In 8th grade (~16 years ago) my substitute biology teacher organised a "Water drinking competition" poised to elevate our understanding of stomach capacity, etc. Two of us went to hospital, and ~5 (including myself) had to take multiple days off of school and recover. It's very dangerous. He lost his job.

What was exactly his thinking here? Do biology teachers study biology because that’s kind of the first things you learn (saline concentration, kidney, etc…)

Re: Dehydration's role in learning and memory

#58

Post by csomar »

cess11 wrote: post #56
rambrrest wrote: post #33

Earlier quoted context omitted.

Not too sure - an overload of water can actually be dangerous i think.

Water is poisonous in that too much of it will disrupt electrolyte balance and can be fatal. It's one of the risks with taking MDMA, there are some documented cases where people died from drinking too much water when rolling.

Everything is poisonous at high doses even oxygen.

Re: Dehydration's role in learning and memory

#59

Post by lurking_swe »

legacynl wrote: post #48
Arodex wrote: post #44

Earlier quoted context omitted.

This is bullshit. https://abcnews.com/Health/Wellness/waterlogged-america-drin...

True. The body is perfectly capable of telling you when it needs water, it's called being thirsty. If you're thirsty, drink, otherwise don't.

sort of correct. As one ages the body starts doing a poor job of signaling thirst.

https://medlineplus.gov/ency/article/003086.htm

> As people age, they are less likely to notice their thirst. Therefore, they may not drink fluids when needed.

Re: Dehydration's role in learning and memory

#60

Post by cess11 »

csomar wrote: post #58
cess11 wrote: post #56

Earlier quoted context omitted.

Water is poisonous in that too much of it will disrupt electrolyte balance and can be fatal. It's one of the risks with taking MDMA, there are some documented cases where people died from drinking too much water when rolling.

Everything is poisonous at high doses even oxygen.

"[E]ven oxygen" is funny because it is absurdly reactive and will explode when given the opportunity, and way back when it destroyed pretty much all life on earth except the early cyanobacteria that produced it.

Edit: And yeah, I didn't imply what you're responding to, I described the mechanism for water poisoning.

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