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The guy in the story basically survived 6 days without water and traveled up to 160 miles during that time. It's almost unbelievable. I thought that once you l

The guy in the story basically survived 6 days without water and traveled up to 160 miles during that time. It's almost unbelievable. I thought that once you loose 4-6 kg of water due to sweat the body does not function any more due to the changed concentration of minerals in the cells.

nabla9 2y ago
You risk heart attack even if you are in water only diet (without salts and potassium) for longer periods of time (several weeks).
- sph 2y ago
  Stupid question, but if stuck in the desert you can suck on some rock to recoup some lost minerals, no? I guess like any deer we'd immediately recognise (and love) the taste of rock salt
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  - darby_nine 2y ago
    I've got to imagine this would mess with our ability to cool ourselves even if it gave us more water retention.
- 77pt77 2y ago
  That basically only happens if you do a water fast with distilled water. Regular mineral water will avoid that.
  - Enginerrrd 2y ago
    Uhmm, No... no it will not. That is dangerously incorrect. Mineral water may have a small amount of trace minerals, but it has basically zero electrolytes at relevant physiologic concentrations. Functionally, there'd be almost no difference between distilled and mineral water fasting with respect to electrolyte management. Imbalances in sodium, potassium, magnesium and calcium can get VERY serious very quickly. Mineral water does not really have relevant concentrations of those. I think you're conflating the idea that distilled water isn't particularly good for you since it starts leaching out the trace minerals from parts of your body, with the entire concept of electrolyte management. These are VERY different things, occurring with VERY different relevant concentrations... like at least 1-2 orders of magnitude.
    - cycomanic 2y ago
      > Mineral water may have a small amount of trace minerals, but it has basically zero electrolytes at relevant physiologic concentrations. Functionally, there'd be almost no difference between distilled and mineral water fasting with respect to electrolyte management. This might be correct for what is considered mineralwater in the US (I honestly don't know), but 1l of typical sparkling mineralwater in Germany has about a third of your daily magnesium and calcium recommended amounts (as well as relevant amounts of a view others). https://www.gerolsteiner.de/wissensquellen/wasserwissen/mineralien https://www.gerolsteiner.de/wissensquellen/wasserwissen/mine... And there are waters with even higher concentrations.
      - Alupis 2y ago
        Just a note, most mineral waters are not entirely natural, and contain added minerals and electrolytes. The water coming out of your tap, for instance, does not contain anywhere near the levels of minerals and electrolytes as a bottled mineral water product. The GGP mentioned "regular mineral water" - but most of us (at least in the US) do not purchase bottled mineral water to drink on a day-to-day basis. Most of our water consumption, in one way or another, comes out of the tap.
      - f1shy 2y ago
        That is 1/3 of the minerals you are supposed to get from water! It is recommended 6g of Na per day, which you will not get just from water.
space_oddity 2y ago
When I read these stories, it's like a reminder of the incredible, albeit rare, resilience of the human body

nabla9 2y ago

You risk heart attack even if you are in water only diet (without salts and potassium) for longer periods of time (several weeks).

sph 2y ago
Stupid question, but if stuck in the desert you can suck on some rock to recoup some lost minerals, no? I guess like any deer we'd immediately recognise (and love) the taste of rock salt
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- darby_nine 2y ago
  I've got to imagine this would mess with our ability to cool ourselves even if it gave us more water retention.
77pt77 2y ago
That basically only happens if you do a water fast with distilled water. Regular mineral water will avoid that.
- Enginerrrd 2y ago
  Uhmm, No... no it will not. That is dangerously incorrect. Mineral water may have a small amount of trace minerals, but it has basically zero electrolytes at relevant physiologic concentrations. Functionally, there'd be almost no difference between distilled and mineral water fasting with respect to electrolyte management. Imbalances in sodium, potassium, magnesium and calcium can get VERY serious very quickly. Mineral water does not really have relevant concentrations of those. I think you're conflating the idea that distilled water isn't particularly good for you since it starts leaching out the trace minerals from parts of your body, with the entire concept of electrolyte management. These are VERY different things, occurring with VERY different relevant concentrations... like at least 1-2 orders of magnitude.
  - cycomanic 2y ago
    > Mineral water may have a small amount of trace minerals, but it has basically zero electrolytes at relevant physiologic concentrations. Functionally, there'd be almost no difference between distilled and mineral water fasting with respect to electrolyte management. This might be correct for what is considered mineralwater in the US (I honestly don't know), but 1l of typical sparkling mineralwater in Germany has about a third of your daily magnesium and calcium recommended amounts (as well as relevant amounts of a view others). https://www.gerolsteiner.de/wissensquellen/wasserwissen/mineralien https://www.gerolsteiner.de/wissensquellen/wasserwissen/mine... And there are waters with even higher concentrations.
    - Alupis 2y ago
      Just a note, most mineral waters are not entirely natural, and contain added minerals and electrolytes. The water coming out of your tap, for instance, does not contain anywhere near the levels of minerals and electrolytes as a bottled mineral water product. The GGP mentioned "regular mineral water" - but most of us (at least in the US) do not purchase bottled mineral water to drink on a day-to-day basis. Most of our water consumption, in one way or another, comes out of the tap.
    - f1shy 2y ago
      That is 1/3 of the minerals you are supposed to get from water! It is recommended 6g of Na per day, which you will not get just from water.

space_oddity 2y ago

When I read these stories, it's like a reminder of the incredible, albeit rare, resilience of the human body