White sugar or refined sugar have "zero nutrients," and they are commonly associated with "empty" calories. Sugar is just calories that provide amazing flavor to food, with no fats, vitamins, minerals, or protein.
Sugar is the “new tobacco” as it is highly addictive. Sugar causes the "reward center of the brain" to release large amounts of dopamine, just like other addictive substances do. To get the same rewarding feeling in the brain, our little ones crave for more sweet foods, making it harder to break the habit.