4 ms·

The "you are all dehydrated and need to drink 37 glasses of water a day" myth really needs to die... I'll let Dr Carroll rant for me: https://www.youtube.com/w

The "you are all dehydrated and need to drink 37 glasses of water a day" myth really needs to die... I'll let Dr Carroll rant for me: https://www.youtube.com/watch?v=hbHp7cu2Ubk https://www.youtube.com/watch?v=hbHp7cu2Ubk

nostromo 10y ago
> Research shows that willpower, like energy, is a finite resource. This has recently been called into question as well, as the original study showing "ego depletion" failed replication.
- fsloth 10y ago
  There are certainly states where the psychlogical capability to do things is decreased. If we look at a clinical case of willpower depletion we are looking at depression or other depilitating condition. People at this stage often explain their state that they have only a limited amount of units of action per day after which they cannot psychologically function, and must recharge. This is not normal state by any means, but the implications, IMO, are clear - there is a spectrum of willpower-or-similar-mental-resource available to people. At the other end are the clinically depressed with very little - the question then remains, is, how far this resource stretches on a healthy person and what are the individual differences.
- raphman_ 10y ago
  Source: https://replicationindex.wordpress.com/2016/04/18/is-replicability-report-ego-depletionreplicability-report-of-165-ego-depletion-articles/ https://replicationindex.wordpress.com/2016/04/18/is-replica...
mark_l_watson 10y ago
3.2 liters of water a day is much less than 37 glasses of water. The article mentioned 3.2 liters.
- JshWright 10y ago
  "37" was hyperbole. 3.2 liters of water (on top of all the water we already get from prepared foods, coffee, soda, etc) is still a _crazy_ amount of extra water.
  - brianwawok 10y ago
    Coffee is mostly water believe it or not. If someone tells you it doesn't count they are fail.
    - JshWright 10y ago
      Anyone who has ever made coffee should have a fair idea of how much water is in it... I think the concern people have with coffee is that caffeine is a diuretic, so you lose more water than you take in. While it's technically true that coffee does make you urinate more, it's a very tiny effect.
      - brianwawok 10y ago
        Except with regular use the diuretic effect goes away. There is no measurable difference in hydration levels of coffee vs non coffee drinkers. If it had a long term effect you would expect the coffee drinkers to be chronically dehydrated.
        JshWright 10y ago
        No, even in very short term use, the net effect of drinking coffee is to increase the amount of water in your body. The diuretic effect of the caffeine is more than offset by the water in the coffee (by a very wide margin).
- perlgeek 10y ago
  In 1945 there was a recommendation that a healthy adult should have about 2.5 liters of water intake a day, including water that is part of the food you eat. Somehow the media managed to drop the last part, and recommended you drink at least 2l water a day. Or even more. Source: http://www.sciencealert.com/there-s-no-evidence-we-need-to-drink-eight-glasses-of-water-a-day-researcher-advises http://www.sciencealert.com/there-s-no-evidence-we-need-to-d... I know of no credible research that shows that drinking more than required to still thirst is beneficial in a healthy human.

nostromo 10y ago

> Research shows that willpower, like energy, is a finite resource. This has recently been called into question as well, as the original study showing "ego depletion" failed replication.

fsloth 10y ago
There are certainly states where the psychlogical capability to do things is decreased. If we look at a clinical case of willpower depletion we are looking at depression or other depilitating condition. People at this stage often explain their state that they have only a limited amount of units of action per day after which they cannot psychologically function, and must recharge. This is not normal state by any means, but the implications, IMO, are clear - there is a spectrum of willpower-or-similar-mental-resource available to people. At the other end are the clinically depressed with very little - the question then remains, is, how far this resource stretches on a healthy person and what are the individual differences.
raphman_ 10y ago
Source: https://replicationindex.wordpress.com/2016/04/18/is-replicability-report-ego-depletionreplicability-report-of-165-ego-depletion-articles/ https://replicationindex.wordpress.com/2016/04/18/is-replica...

mark_l_watson 10y ago

3.2 liters of water a day is much less than 37 glasses of water. The article mentioned 3.2 liters.

JshWright 10y ago
"37" was hyperbole. 3.2 liters of water (on top of all the water we already get from prepared foods, coffee, soda, etc) is still a _crazy_ amount of extra water.
- brianwawok 10y ago
  Coffee is mostly water believe it or not. If someone tells you it doesn't count they are fail.
  - JshWright 10y ago
    Anyone who has ever made coffee should have a fair idea of how much water is in it... I think the concern people have with coffee is that caffeine is a diuretic, so you lose more water than you take in. While it's technically true that coffee does make you urinate more, it's a very tiny effect.
    - brianwawok 10y ago
      Except with regular use the diuretic effect goes away. There is no measurable difference in hydration levels of coffee vs non coffee drinkers. If it had a long term effect you would expect the coffee drinkers to be chronically dehydrated.
      - JshWright 10y ago
        No, even in very short term use, the net effect of drinking coffee is to increase the amount of water in your body. The diuretic effect of the caffeine is more than offset by the water in the coffee (by a very wide margin).
perlgeek 10y ago
In 1945 there was a recommendation that a healthy adult should have about 2.5 liters of water intake a day, including water that is part of the food you eat. Somehow the media managed to drop the last part, and recommended you drink at least 2l water a day. Or even more. Source: http://www.sciencealert.com/there-s-no-evidence-we-need-to-drink-eight-glasses-of-water-a-day-researcher-advises http://www.sciencealert.com/there-s-no-evidence-we-need-to-d... I know of no credible research that shows that drinking more than required to still thirst is beneficial in a healthy human.