Quote Originally Posted by SadieKate
Endurolyte pills from Hammer. They work fast, don't upset my stomach and no extra calories so you don't have to plan calorie and electrolyte intakes separately.
You might like NUUN too - its a sugar free, carb free, electrolyte drink that come in a tablet form and fizzes to disolve - but is not fizzy when its finished.

http://www.nuun.com/index.html