The characteristics, examples and health roles of functional foods, fortified foods and the use of food as medicine within a balanced diet

What this dot point is asking

This dot point asks you to distinguish functional foods from fortified foods, name reliable examples, explain the specific health role of each, and evaluate how useful they are compared with eating a varied whole-food diet. Strong answers pair a named food with a named compound and a clear body benefit.

What is a functional food

A functional food is a food that provides a health benefit beyond its basic nutritional value, because of a naturally occurring or added bioactive component. The benefit might be improved gut health, lower cholesterol or reduced inflammation.

Common functional components include:

• Probiotics: live beneficial bacteria, found in yoghurt and fermented foods such as kefir, that support a healthy gut microbiome.
• Prebiotics: types of fibre (such as inulin in onions, garlic and wholegrains) that feed beneficial gut bacteria.
• Omega-3 fatty acids: found in oily fish such as salmon and sardines, linked to heart and brain health.
• Plant sterols: added to some margarines, which can help lower blood cholesterol.
• Antioxidants: such as vitamin C and polyphenols in fruit, vegetables and tea, which help limit cell damage.

What is a fortified food

A fortified food has had one or more nutrients added during processing, usually to address a known shortfall in the population or to replace nutrients lost in manufacturing. Fortification can be mandatory (required by law) or voluntary (a manufacturer's choice).

Australian examples include:

• Iodised salt: iodine added to prevent goitre and support thyroid function.
• Folic acid in wheat flour for bread: mandatory, to reduce neural tube defects such as spina bifida in babies.
• Vitamin D in edible oil spreads (margarine): mandatory, to support calcium absorption and bone health.
• Calcium or vitamin B12 in plant-based milks: voluntary, to match nutrients found in dairy.

Food as medicine within a balanced diet

The idea of food as medicine is that everyday foods, eaten regularly, can help prevent or manage health conditions. Examples include using wholegrains and legumes (high fibre, low glycaemic index) to support blood glucose control, or oily fish and unsaturated oils to support heart health.

These foods work best as part of an overall balanced diet that follows the Australian Dietary Guidelines, not as isolated fixes. A single functional yoghurt cannot offset an otherwise poor diet high in saturated fat, salt and added sugar.

When evaluating these foods, weigh the benefit against the cost, the marketing claims and whether a whole-food alternative would do the same job. A serve of oily fish provides omega-3 directly and cheaply, while some fortified products carry added sugar or a premium price. The best answers show that functional and fortified foods can support health, but a varied whole-food diet remains the foundation, and you should always check that a claimed benefit is backed by evidence rather than advertising.