There are many different types of food additives, with many different functions.
Food color, for instance, changes the color of the food.
Preservatives keep it from spoiling.
Others make it crunchy (lime or alum in sweet pickles), flavor it, or make changes to texture.
An additive function is a unary function which preserves the addition operation.
An additive is a substance added to another substance or product in order to alter its properties. It can be variously applied to an arithmetical function or concept, rhythm, or colour. It can be used to refer to a substance added to food to improve its flavour or appearance.
The food additive E417 is tara gum. It's an ingredient used as a food binder or thickening agent.
chocolate
Yes it's a food additive. It is used as an antioxidant and it is a color retention agent.
Yellow 2G - a food coloring additive
Food coloring.
Disodium phosphate is used mainly as a food additive to stabilize food. Used as a food additive it is said not to have any harmful effects.
Alkanet
inhibitor.
Gardenia Blue
Since subtraction is the inverse function of addition, the additive inverse of one half is minus one half.