Nope. At least 12 different scientific studies have found no connection, says Andrea Giancoli, RD, a spokeswoman for the American Dietetic Association. While sugar is a carbohydrate that our bodies use for energy, it shouldn't make you more hyper than if you ate any other carbohydrate.
So why does it seem like kids go crazy when they get their hands on something sweet? It may be a self-fulfilling prophecy (you expect them to act out after eating it, so they do) or the environment they're eating it in (like having cake at a birthday party with lots of kids running around). Whatever the reason, "maybe it's not so terrible that this myth persists," says Giancoli. "We don't want our k