FOOD FOOD PRESERVATIVESPRESERVATIVES & E NUMBERS& E NUMBERS

PART 1

FOOD ADDITIVESFOOD ADDITIVES

Aims

To explain why additives are added to food

characterize the various types of food additives

introduce the E numbers used on food labels

PreservativesPreservatives

What are Preservatives?What are Preservatives?

What are traditional preservative? What are traditional preservative?

PROCESSED FOODSPROCESSED FOODS

What are processed foods?

ANTIOXIDANTANTIOXIDANT

What are Antioxidant?

What are flavourings?What are flavourings?

Is it okay to add flavours to Is it okay to add flavours to processed foods?processed foods?

Yes or NoYes or No

Explain why Explain why

What are Emulsifiers And What are Emulsifiers And Stabilizers?Stabilizers?

How important are they?

• Basic Mayonnaise -To scale this recipe up or down, the ratio is one yolk per cup of oil

• Ingredients• 1 egg yolk

a heavy pinch of salta pinch of sugara few grinds of black pepper (use white if you don’t want black specks in your mayonnaise)1 teaspoon vinegar1 teaspoon lemon juiceAbout 1 cup neutral oil

What are Emulsifiers And What are Emulsifiers And Stabilizers?Stabilizers?

What are E Numbers?What are E Numbers?

What are E Numbers?What are E Numbers?

Is it safe to eat processed foods without E Numbers?

YOUR TASKRecap last lesson

Review Practical Review Practical

1. Which is the best preservative and why?

2. Which is the best antioxidant and why?

3. Make a note of your observations and results in a table and write an evaluation and conclusion for your investigation.

Investigating Emulsifiers And Stabilizers

Make suggestions for improvementMake suggestions for improvement

Practical ActivityPractical Activity

Discuss practical activity