I always suspected food dyes could pose a health risk, but had no idea how serious a threat until I read they cause:
Food dyes—used in everything from M&Ms to Manischewitz Matzo Balls to Kraft salad dressings—pose risks of cancer, hyperactivity in children, and allergies, and should be banned, according to a new report by the Center for Science in the Public Interest.
A top government scientist agrees, and says that food dyes present unnecessary risks to the public.
The three most widely used dyes, Red 40, Yellow 5, and Yellow 6, are contaminated with known carcinogens, says CSPI. Another dye, Red 3, has been acknowledged for years by the Food and Drug Administration to be a carcinogen, yet is still in the food supply.