Food additives are non-nutritional substances added to food products. They are used for technical purposes, such as the emulsification of fats, the binding of water, or to protect and preserve products from microbial deterioration. Some food additives are necessary to ensure that products are safe to eat.
There are a number of different categories of food additives, each according to the function of the additives, and a food additive numbering scheme has been established to order the additives in the different categories.
The numbering scheme was first established within the European Union where food additives are given an ‘E number’ or ‘Europe number’ and all food additives used in the European Union have to be approved for food safety by the European Food Safety Authority.