Originally Posted by
gnome
Mostly just water. If it is summer or I'm doing a long ride I'll put what ever powdered isotonic drink is available at the supermarket. I'll occassionaly make my own concoction of molasses, salt and brown sugar. I need to experiment more to get the ratios right: sometimes it is too sweet, sometimes too salty.
That, or just buy the Gatorade where all the work and experimentation has already been done. Sure the ingredient are pretty basic, but as you say finding the optimal balance is an entirely different matter.