Saltydog, I missed the part about the blood test in that article. :blush:
In the Sierra, I often get a very dry mouth while hiking. But that is because I am breathing heavily enough (due to climbing), and the extremely dry air. I suppose lots of people will assume the dry mouth is an indication of dehydration, but it isn't. They need to also consider how often they are peeing.
I don't carry extra electrolytes with me when I hike. If I am peeing every couple of hours, and it is mostly clear, then I figure I'm doing ok.
