I'm a little late coming to this - but there is an electrolyte mix made by Alcer which is available from most health food stores. It has no sugar, sweetners, etc etc so I can tolerate it. (I can't have any sugars/glutens!) It has a lemon-limey taste - very subtle and mixes with water so you can put it in your water bottle and/or drink it after you ride. What is does have is calcium, potassium, magnesium, manganese, boron, and - oh darn it - I forget the other ingredient. Most OTC sports drinks made me very sick to my stomache before I found out why. Hoping this will help.
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"