So this is my first season riding. I ride up in CT, sometimes with MMcG. I have a question about hydration. I'm pretty good about my water use, I'm about 1 liter per hour of riding, but I was curious if I should start using a rehydration supplement either before, during, or after my ride? And which one should I use. I know that water is good but more than water comes out when you sweat. Also, I'm diabetic so I can't use a supplement thats really high in sugar (like GNC's distance), and I'd prefer to get a powder you mix with water, since they're usually cheaper. Thanks.