I've taken food dyes out of my son's diet amd it's help some with his temper. It's not easy to do, but it helps. check out the feingold diet website.
NO DAIRY PRODUCTS, NO JUNK FOOD, NO FRUIT JUICES, CUT SUGAR INTAKE, CUT CHOCOLATE BY 90%, NO NUTRASWEET, NO PROCESSED MEATS and NO MSG, CUT FRIED FOODS BY 90%.
Try the Feinberg- Gold diet.