"Let a kid drink Pepsi or Coke and you've got a hyperactive kid."
That is not always the case. A friend's son was hyperactive, she did not allow him colas. He was still hyperactive.
He was not able to drink red pop without it affecting him. The red dye in the pop, set him off.
There are some kids who are hyperactive. I have no doubt the diet is the problem yet not all parents give their kids, Pepsi, Mountain Dew (another claim to hyperactive) or Coke. The kids are still hyper without these drinks.