Your health teacher and your mom always told you: You can’t have that delicious piece of candy because it’ll make you hyper. This is more about expectation than reality, however. A 1995 study actually debunked the sugar/hyperactivity connection. After analyzing 16 studies on sugar’s effects in children, the conclusion was reached that “sugar does not affect the behavior or cognitive performance of children.” So, yes, it really is OK to eat sugar!