I know! I'm pissed off and shocked, too.
According to a study conducted at the University of Southampton (linked to on Grinder)
We now have clear evidence that mixtures of certain food colours and benzoate preservative can adversely influence the behaviour of children. There is some previous evidence that some children with behavioural disorders could benefit from the removal of certain food colours from their diet. We have now shown that for a large group of children in the general population, consumption of certain mixtures of artificial food colours and benzoate preservative can influence their hyperactive behaviour.
Sorry, I know that's a real downer. But hey, at least no one's saying babies shouldn't watch TV, right?