It's not just the sugar, it's ALL the carbs. Eat too many carbs of any kind and you will put on weight. Man does not live by bread alone, in fact it will kill you off early.........
I switched to low-carb with exercise, lost 85 pounds, ended almost all my diabetic meds, and now have normal blood A1C levels. I feel like I’m 35 (I’m 50).
Low-carb really does work. (You gotta do aerobic exercise too though.)