What your doctor is worried about is your spiking your blood sugar by eating stuff like simple sugars which stress your pancreas in response. So when you aren't riding, get your carbs from fruit and vegetables. Especially no beer, colas, sports drinks, stuff like that. No carby snacks like bread, sweet rolls, stuff like that. Only have a small amount of real carbs like rice, potatoes, cereals, stuff like that. Certainly no more than 1/4 of your plate simple carbs. On the bike is a different story, however, because your body responds differently while you are exercising.

I ride with a couple of type 1 diabetics. Their regimen is no preride food. Nada. Nothing for breakfast if it's a morning ride, nothing within 3 hours if it's an afternoon or evening ride. That way they avoid spiking blood sugar and having that mess with their ride. Then during the ride, consume the standard 250 calories/hr., mostly or all carbs, if you are riding hard, less if you are taking it easier, down to maybe 150 cal./hr. So a lot more than you are eating now. Make an effort to eat more. It takes conscious effort to eat enough. So that's about 1 Clif Bar/hr., more or less. You don't have to worry about eating all those carbs because your insulin response will be very different than when you aren't riding.

If you eat like that while you're riding, you shouldn't have to eat so much when you are finished with the ride. You can go right into your normal carbs-from-fruit-and-veggies routine and have a normal meal, because your glycogen will not be so diminished. You shouldn't feel so wiped out, in fact you should feel great. Your feeling wiped out is almost certainly blood sugar related and nothing to do with electrolytes. You have a ton of electrolytes in your body and it takes a heck of a lot of riding to really diminish them.

What is happening to you is that you are greatly diminishing your glycogen stores while riding. So as soon as you finish your ride, your body's economy completely changes and your blood sugar goes to hell. Then you have that sugary Gatorade, which spikes your blood sugar, but that gets cleaned out pronto, getting used to replenish glycogen, and your blood sugar is back in the toilet and you feel lousy.

So don't use a recovery drink unless you can't eat a normal meal right away. Even a recovery drink will only hold off the blood sugar demon for an hour or less. So you have to eat normally as soon as possible after the ride. Try eating a small but normal meal, waiting an hour, and having some more. Then maybe waiting an hour and having another small serving.

IOW, it's OK to eat half a pizza, as long as you only eat one slice an hour. Of course stop when you aren't hungry any more. But start the after-ride eating process even if you aren't hungry. A symptom of low blood sugar is initial lack of hunger.

Don't use Gatorade. You could try a sports drink like HEED or Cytomax, as long as you also have a bottle of plain water. I also separate my electrolytes out from my hydration and food. That way I have control over each nutritional aspect. I use Endurolytes, which are quite mild. About one/bottle of liquids seems about right, or one/hr. Some people use more. If you don't feel thirsty in warm weather, take more Endurolytes until you do feel thirsty.

On a short ride of an hour, maybe even up to 2 hours, it's not really necessary to eat or drink anything, though a little plain water might be nice. Your regular diet will easily replace any losses.