I sweat like crazy, but I'm not convinced that it's only salt I need to replace. (And my body fat isn't THAT high. I sweat way more than a lot of people I know who have much higher body fat.)

I'm being lazy right now (other things on my mind) - anyone want to point me in the direction of research on sweat loss of electrolytes? I know for sure I sweat out lots of magnesium, for one thing. And it troubles me to replace sodium and not potassium. So I'm a fan of Emergen-C too. I just wish it didn't have so much ascorbic acid (which can leach calcium). I tried the knock-off brand with Ester-C, but the packaging just wasn't completely moisture tight, so they were mostly cakey lumps. Yuk.