sucrose = glucose + fructose - water
  lactose = glucose + galactose - water
  maltose = glucose + glucose - water

Starch and glycogen are basically all glucose.

Based on this study, I would guess that replacing all HFCS with an equivalent-sweetness amount of regular corn syrup (all glucose) would immediately result in significant improvements to the public health, even though the sweetened products would have more calories per serving.