Oranges? Can they cause bad behaviour?

[caz2008]

Hi my three year old - seems to be very hyperactive when shes had oranges at nursery.., ive never herd of oranges causing children behavioural problems...but she is only ever this bad wen shes had oranges, she will be very hyper and naughty, more than normal.
anyone got any ideas?

 

[kalia]

I've never heard of it with fresh oranges but I have with orange juices because of the colourings that have been added.