Sugar Can Enhance Alertness
Sugar is your brain's preferred fuel source -- not table sugar, but glucose, which your body processes from the sugars and carbs you eat. That's why a glass of something sweet to drink can offer a short-term boost to memory, thinking, and mental ability.
Have too much, though, and memory can be impaired -- along with the rest of you. Go easy on the sugar so it can enhance memory without packing on the pounds.