Yes, all the ways in which human lose water they also lose electrolytes (“salts”). More with sweat, but still some with urine. So, re-hydrating should include at least some of those. This has been known for decades, tho ravers often forget it and have died from hyponatremia.
Living in the sauna that is Arkansas, I don’t usually think about dry air, but I think you are correct. If you’ve dehydrated yourself through breathing, plain water is fine for hydration.
Yes, all the ways in which human lose water they also lose electrolytes (“salts”). More with sweat, but still some with urine. So, re-hydrating should include at least some of those. This has been known for decades, tho ravers often forget it and have died from hyponatremia.
All except one: you also lose water through exhalation, particularly in dry air. It’s basically never going to be the main way you lose water, though
^This person has witnessed Arrakis
Living in the sauna that is Arkansas, I don’t usually think about dry air, but I think you are correct. If you’ve dehydrated yourself through breathing, plain water is fine for hydration.
Most people get enough salt for the day through food though.
If you can have food that is an electrolyte source with your water, that’s fine.
If you consumed the food prior to the dehydrating events, it won’t assist in restoring electrolytic balance.