Fructose, Over Eating, Brain Activity and Weight Gain

Brain image study: Fructose may spur overeating | Yahoo! Health

This is your brain on sugar — for real. Scientists have used imaging tests to show for the first time that fructose, a sugar that saturates the American diet, can trigger brain changes that may lead to overeating.
After drinking a fructose beverage, the brain doesn't register the feeling of being full as it does when simple glucose is consumed, researchers found.