4. They are added to food
so that food can last
longer, make food look
more appetizing and
taste more delicious.
5. TYPES
Type of food
additives
Examples
Preservatives Sodium nitrate, sodium
benzoate
Antioxidants Ascorbic acid (vitamin C)
Flavouring agents Monosodium glutamate
(MSG), aspartame
Stabilizers and
thickening agents
Acacia gum, azo compounds,
triphenyl compounds
6. Functions of Food Additives
Type of food
additive
Function
Preservatives Prevent or slow down
spoilage of food
caused by bacteria,
fungi or
microorganisms.
7. Functions of Food Additives
Type of food
additive
Function
Antioxidants Oils and fats in food are
oxidized by air. The food
then has an unpleasant
rancid taste and odour.
Antioxidants slow down
oxidation of food.
8. Functions of Food Additives
Type of food
additive
Function
Flavouring
agents
Most of the natural
flavours of food are lost
during processing. A
flavouring agent
enhances the flavour
and aroma of food.
9. Functions of Food Additives
Type of food
additive
Function
Stabilizers
and
thickening
agents
They improve the
appearance of food by
making it look more
delicious. They give food
a firm texture that is
smooth and uniform.
10. Functions of Food Additives
Type of food
additive
Function
Dyes Dyes replace the lost
colours during processing
and make food look more
attractive.
11. The Use of Food Additives
• To preserve, flavour, blend, thicken and colour food.
• Food must be preserved so it will not spoil during transportation.
We have to process food using food additives so that we can
enjoy safe, nutritious and tasty food.
• If we do not use food additives, food will become more
expensive.
12. The Effect of Food Additives on
Health and The Environment
• Food additives have become a necessary part of our daily lives.
• However, the excessive intake of food additives can cause:-
» Allergy
» Cancer
» Brain damage
» Hyperactivity
• Therefore, food additives must be managed correctly so they do not
harm our health.