In August of last year, my blood sugar levels were a little high. Not high enough to be diabetic, but high all the same. I had my blood drawn again the beginning of May (or somewhere around there) and my blood sugar level is now a tad low.
The difference between then and now? Whole grains instead of refined, more veggies, and losing 69 pounds. I didn't eat much sugar last August and I don't eat much now, so I know that wasn't the issue. People always confuse sugar consumption with diabetes, but it's much more than that.
I feel if you focus on learning how to eat healthy foods in healthy amounts while tossing in some exercise you will lose weight and you will no longer be glucose intolerant.