I know this has been discussed before, but it seems like all of a sudden, between last fall and now, my stomach has become very sensitive to Accelerade. I have a sensitive stomach to begin with, but I eat almost everything. I just started doing longer rides this season and have noticed pain/discomfort almost immediately after swallowing even a sip of Accelerade. Of course, I just bought a huge container of it.
I have always had this issue with Gatorade and don't go near it. Any other suggestions as to things to try? I like formulas that have protein, in addition to carbs. Could it be a particular flavor?
Any advice would be appreciated. I drink a huge amount and as the weather gets hotter, I really need the extra stuff in my bottles. I don't have any problems with shot blocks or Clif Bars.

Robyn