By the time it hits the bloodstream, your body doesn't really know anymore where the carbohydrates came from, and a lot of the sucrose has been split into its component parts, freeing the glucose to do whatever it is that triggers a lot of pulling. I think it feeds a yeast.
Fructose does however seem to be much less bad.
I would suggest buying some in the dietetic section of the supermarket and giving it a try instead of syrups. Whole Foods, GNC etc. Click here Fructose - Found in the Diabetic Section of the Grocery Store. The bees gather nectar, which has glucose, fructose, and sucrose, and split the sucrose into it parts, which are again glucose and fructose. Glucose is the primary energy supply for most living things.