Artificial Food Colorings and Hyperactivity

When my son was 2 or 3 he experienced hyperactivity, defiance and just would run around in a ciricle or back and forth with such a burst of energy.  My best friend didn't beleive me and gave him 3 red fish.  he would run through the house and to the playset and back into the house wihtout stopping for about 5 minutes until the energy wore off.    I took dyes out of his diet for about 3 years.  I would gradually let him start having it in small quanities at age 6 and didn't see the same effect on him.  I still don't buy too many things with dyes in it cause its just not good for you but they say it affects young children.  I won't say hes not defiant because he defently is at age 7 but he doesn't get that burst of energy.  So your son can grow out of it.