1. FOOD ADDITIVES

2. FOOD ADDITIVES
Natural foods contain mixtured of carbonhydrates,lipids, proteins, vitamins, mineral and water.
Many foods consomed in developed world also contain other substance.

4. FOOD ADDITIVES
Additional substance
Fortifiers
Additives

5. These are substance added to increase the nutrient value of the food.
FORTIFIERS
These are substance added to increase the nutrient value of the food.

6. may be natural or synthetic.
ADDITIVES
improve the apperance, flavour, texture and storage properties of the food.
may be natural or synthetic.
All additives have an E (european) number and must be pre-test on animals.

7. Flavourings and flavour enhancers
Most common food contains additives
Some are natural and some are artificial
flavour enhancers makes existing flavours stronger by stimulating tha taste buds.

8. COLOURING
Improve colour which may have been lost cooking or by dilution.
May be natural or synthetic.
Cannot be added to baby food.

9. PREVENTION OF SPOILAGE-PRESERVATIVES
Inhibit growth of fungi or bacteria
Slow down deterioration caused by athmospheric oxidation added to fruit drinks

10. IMPROVEMENT OF TEXTURE
Thickeners alter the consistency of food
Stabilisers prevent components of emulsions separating out.

11. Additives may be dangerous
Tartrazine
Sulphur dioxide
Monosodium glutamate

12. References:
IGCSE BIOLOGY COURSE BOOK

13. THANKS FOR LISTENING