Our love of sugar once helped our foraging ancestors get more bang for their buck from rare, high-energy foods. Today, it drives us back to the store at 10pm to satisfy a cheeky chocolate craving. We do this even though we know many of the physical and metabolic risks of excess sugar , such as obesity, diabetes, tooth decay , and even memory impairment . But how well can we undo the damage by changing our diets? According to a new systematic review and meta-analysis , it is possible to reverse