i know from experience that I sweat like a horse and lose salt at an alarming rate. I have salt smuggled away in my gear in various places. Salt depeltion can turn a hike into an ordeal.

Here in Brazil I can't find powdered Gatorade but I have a few cans of it that I brought from the States (I'm an American). I also use buffered salt tablets called "Thermotabs" that are available in drugstores in the States. Two thermotabs, a canteen of water and a tablespoon of honey and you're back to normal.

The thermotabs are fragile and subject to humidity. They don't take too much abuse in a pack.

Every time I'm in a restaurant and they have those little salt packets I load up. You can find tham stashed away in various places. I even have salt in my survival knife. Mac