My nephew (8 yrs) is allergic to RED food dyes; Red #5, Red#40, Red Lake#45...etc. He was diagnosed as ADHD by three GPs. After two weeks of 'red dye abstinence', the behavior/symptoms associated with ADHD had subsided; however, if he eats a few gummy bears or a scoop of strawberry ice cream, then he's bouncing off the walls. Not a scientific observation on my part...but worth the due diligence on your part...if you're a parent.