Many people avoid artificial colours in their foods, but don't check out the colours in cosmetics and personal care products. It is only in recent years that cosmetics have started to carry a full list of ingredients on their packaging.

Making sense of the ingredients can be difficult for the lay person. This is particularly true for colourings, which often go under the guise of numbers rather than names.

In many countries colours in cosmetics are listed as colour index numbers. C.I. numbers are allocated by the Society of Dyers and Colourists. The scheme covers colours used in food, personal care products, cosmetics, household products and fabric dyeing. So, for example you will not normally see