FOOD ADDITIVES.

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Presentation transcript:

FOOD ADDITIVES

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

FOOD ADDITIVES Additional substance Fortifiers Additives

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.

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.

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.

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

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

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

Additives may be dangerous Tartrazine Sulphur dioxide Monosodium glutamate

References: IGCSE BIOLOGY COURSE BOOK

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