Functional properties of food: overview of SQA Higher Health and Food Technology Area 3
An overview of the functional properties of food strand of SQA Higher Health and Food Technology, covering aeration, binding, coagulation, dextrinisation, emulsification, gelatinisation, shortening, thickening and raising agents, and how they are used in product development.
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Functional properties of food is the food-science strand of SQA Higher Health and Food Technology. It explains the jobs ingredients do in a recipe - why a sauce thickens, a cake rises, pastry is crumbly and mayonnaise stays mixed - and how a developer uses these properties to engineer a new product. This page maps the key area and shows how it connects.
The key area
Functional properties of ingredients. The single, rich key area of this strand covers aeration, binding, bulking, coagulation, dextrinisation, emulsification, gelatinisation, shortening, thickening, browning and caramelisation, and the use of raising agents. For each, you should know the property, the ingredient responsible, and an example dish, and be able to apply it in product development.
How this strand connects to the rest of the course
Functional properties link the science of food to its design:
- Food, nutrition and health - the same fats, proteins and carbohydrates that matter for health give food its functional properties.
- Contemporary food issues - additives such as emulsifiers and the effects of processing build on these properties.
- Food product development - choosing ingredients for their functional properties is at the heart of designing and improving a product.
How to study this strand
- Pair property, ingredient and example. For each property learn what it does, which ingredient provides it, and a dish that shows it.
- Separate the look-alikes. Gelatinisation (starch) is not coagulation (protein); dextrinisation and caramelisation are different browning reactions.
- Remember fat does several jobs. Shortening, aeration and flavour all come from fat, which matters for low-fat development.
- Think like a developer. Be ready to say which property you would use to get a particular texture or to fix a faulty product.
- Use SQA past papers. Questions often give a dish and ask for the properties and ingredients involved.
The key area in detail
The key area has its own answer page with worked questions and cross-links. Browse it and the rest of the course from the subject hub.
For the official course specification
The SQA publishes the full Higher Health and Food Technology course specification, specimen and past papers, and marking instructions at sqa.org.uk. Always revise from the current specification and SQA past papers, because question style and terminology are board-specific.