Live data from Hacker News

Dehydration's role in learning and memory

cshl.edu

71–80 of 81 posts

Re: Dehydration's role in learning and memory

#71
post #45

Earlier quoted context omitted.

It’s a glass of water an hour. Hardly excessive.

It doesn't do anything to drink so much water. It is a purely American myth/trend. https://abcnews.com/Health/Wellness/waterlogged-america-drin...

I bet that your body needs more water if you eat ungodly amounts of salty processed food, just to flush all that shit out again.

Re: Dehydration's role in learning and memory

#72
post #57

Earlier quoted context omitted.

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…)

At least where I am, substitute teachers don't have to study anything in particular at all. You simply need to have completed X number of credit hours at an accredited institution, no actual degree or certificate is required and the coursework can be literally anything. As a newly-graduated history major I signed up to substitute teach out of desperation, and was sent everywhere from kindergarten to calculus.

Re: Dehydration's role in learning and memory

#73
post #69

Earlier quoted context omitted.

Indeed. That’s why I form the habit to drink 3 liters everyday to keep my urine white transparent.

I wonder how much of the effects of ageing are due to cascading failures downstream of alterations like these. For example, it's common for people to lose teeth in advanced ages. How much of this is due to dry mouths from insufficient water intake? Fallen teeth then may become entry points for infections, et cetera. Perhaps fixing a few early causes we can avoid a lot of negative effects and live more, without the ne…

I don’t know the exact things. I only know that diabetes would make this loss tremendously. As to teeth loss, it’s mainly because periodontitis but not age though it always goes worse as the age increases because of their life behaviors.

Re: Dehydration's role in learning and memory

#74

Earlier quoted context omitted.

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.

I’m not arguing that 100% of water consumed can be retained, just that peeing every 30 minutes means you have an unnecessarily large surplus. This is simply a truth.

Re: Dehydration's role in learning and memory

#75
post #46
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.

I always laugh about those ridiculously large water bottles American carry and how they remind you all the time that you must drink water as if I did need it. I wonder why that happens.

Re: Dehydration's role in learning and memory

#76
post #46

Earlier quoted context omitted.

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

They also eat plenty of salty processed foods.

Re: Dehydration's role in learning and memory

#78
post #34

Earlier quoted context omitted.

You are correct, title is wrong. Blame this communicator. It feels that the person that wrote the text lacks understanding of chemistry or oversimplified too much. More appropriate term for removal of water around an ion is “desolvation”.

No, dehydration is the common term when it's specifically water that's being removed. https://en.wikipedia.org/wiki/Dehydration_reaction

You are referencing to another thing. Desolvation and dehydration are not the same thing. Please google the difference between them. The title describes desolvation

Re: Dehydration's role in learning and memory

#80
post #52
post #46

Earlier quoted context omitted.

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.…

European recommendations:

https://www.eufic.org/en/healthy-living/article/how-much-wat...

Post reply on HN