Who would deny the mouth-watering appeal of a deep-pink strawberry ice cream on a hot summer's day or roast duck with wonderfully crispy skin accompanied by cucumber and green onions?

Even early civilizations such as the Romans recognized that people "eat with their eyes". Butter has been colored yellow as far back as the 1300's.

Now almost all packaged foods, even so called "health foods", have additives in them. Today there are nearly 2,000 certified food additives.