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The myth that we need eight glasses of water a day 
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EVERYTHING HAS WATER IN IT.



apart from Pot Noodles before rehydration.


Thu Jul 14, 2011 11:11 pm
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And sand. Or diamonds.

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Thu Jul 14, 2011 11:16 pm
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I just reheated my sand and diamond lunch, I should really switch to a less expensive diet, but I feel sand alone so unsatisfying.


Thu Jul 14, 2011 11:21 pm
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Then you get comments about tea and coffee being diuretics and so you need to drink even more. I drink plenty of tea and coffee and and am more than adequately hydrated.

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Fri Jul 15, 2011 12:17 am
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Amnesia10 wrote:
Then you get comments about tea and coffee being diuretics and so you need to drink even more. I drink plenty of tea and coffee and and am more than adequately hydrated.

This one really shows up the so-called "diet experts" for the charlatans they are. I had a conversation once that went like this:

ignorant fool: For every cup of tea or coffee you need to drink two glasses of water to compensate for the dehydration caused by the diuretic effect.

Me trolling: But I drink tea that is only one third as strong as you, so that's fine.

ignorant fool: No. For every cup of tea you need to drink two glasses of water. I am repeating what I was told and it is true.

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Fri Jul 15, 2011 12:26 am
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Yes but the process of drinking tea adds fluid as well. :roll: So yes if I feel thirsty I will drink something. I never count how much I drink. I blame the Daily Mail. :lol:

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Fri Jul 15, 2011 2:07 am
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JJW009 wrote:
I get dehydrated very easily, especially if it's warm. Even as a child I had to drink 2 litres every 4 hours if I was exercising in the sun to avoid chronic fatigue and head aches. I generally get through about 2 litres of water just while I'm at work.

In the winter, if I'm not doing ought and the heating isn't set to "Vulcan" then I only need about 500ml a day...

+1 I drink a lot at work. A couple of litres is normal.

If I don't drink in the afternoon, then my tongue starts to swell up and I get a headache.

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Fri Jul 15, 2011 4:06 am
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I drink over 2 litres of water at work as well. I suspect it's the effect of the air conditioning (which is a surprise as it seems to break down quite regularly) as I don't drink nearly as much when I'm not at work and feel just fine on it.

There was a bit on a QI about hydration (although I think it was mainly referring to the effects of alcohol). They'd had a fairly irate letter from a dietician (or whichever one it is that has an actual proper qualification with learning involved). For hydration pretty much anything was acceptable except salt water and spirits (can't remember if beer was also okay due to the relative amounts of water and alcohol). For tea and coffee the diuretic effect was massively overcome by the sheer volume of water.

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Fri Jul 15, 2011 6:07 am
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I tend to sweat like a rapist, I drink whatever fluids I like when I want to.

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Fri Jul 15, 2011 6:42 am
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belchingmatt wrote:
I tend to sweat like a rapist, I drink whatever fluids I like when I want to.

How do you know what rapists sweat like? ;-)



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Sat Jul 16, 2011 12:15 am
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ProfessorF wrote:
I thought this was pretty old news - the original research said that we needed about 8 glasses, or ~1 litre, of water a day including water gained from food intake. That second bit was left out when the story was propagated.


This.

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Sat Jul 16, 2011 8:39 am
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finlay666 wrote:
cloaked_wolf wrote:
Doesn't air conditioning have a dehydrating effect by drawing moisture from the air so more is lost from our respiratory system?
Yep, it's why my gf can't wear her contacts at work because her eyes get too dried out

I can confirm that. I changed jobs two months ago and it only confirmed what I was suspecting. The air-con in our old office was murdering my eyes. It got so bad that I went to see an optician due dryness and started using moisturising eye drops on her advice.

Since I started working in the new office I haven't had to use eye drops once.
BTW, I don't wear glasses or contacts

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Sat Jul 16, 2011 9:30 am
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I always remember working in an air conditioned office a few years ago. I was eating an orange, and I'd separated the segments for some reason. Half way through someone came in to ask a question which turned into a half hour thing. Got back to my desk, picked up one of the orange segments and thought 'this feels a bit weird'. PInched it with both hands and snapped it in half, like a twig. In half an hour the aircon had dried an orange segment out to the point where it wasn't flexible at all.

After that we managed to find this kind of toy fountain thing. Basically it was a bowl with.. a figure of a mermaid sat on the rim I think with a tiny electric pump. You put like a pint of water in the dish and the pump pumped it around. Just that made enough difference to the humidity in the room. We needed to refill it every morning though...

Jon


Sat Jul 16, 2011 9:46 am
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jonbwfc wrote:
I always remember working in an air conditioned office a few years ago. I was eating an orange, and I'd separated the segments for some reason. Half way through someone came in to ask a question which turned into a half hour thing. Got back to my desk, picked up one of the orange segments and thought 'this feels a bit weird'. PInched it with both hands and snapped it in half, like a twig. In half an hour the aircon had dried an orange segment out to the point where it wasn't flexible at all.

After that we managed to find this kind of toy fountain thing. Basically it was a bowl with.. a figure of a mermaid sat on the rim I think with a tiny electric pump. You put like a pint of water in the dish and the pump pumped it around. Just that made enough difference to the humidity in the room. We needed to refill it every morning though...

Jon

Wow, that's quite a story! Freeze-dried employees!

Another place folks should really consider the humidity is in their server rooms. Air is a very poor conductor of heat when it's dead bone dry, so you can save a lot of money by fitting a really rather cheap humidifier. Computers don't usually sweat when they're hot, so the mechanics are different.

I also remember reading an article about an experiment in schools concerning humidity. It basically proved that people are more likely to get sick if the air is too dry. It wasn't just "statistically significant" - it was something like twice as likely.

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Sat Jul 16, 2011 11:20 am
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Thankfully I don't have airconditioning at any of the places where I've worked. Even in the car, I tend to use it infrequently and will sometimes switch it off and open the window if I feel the air is getting dry.

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Sat Jul 16, 2011 1:42 pm
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