A food (or component of a food) that can trigger an immune reaction in sensitive people, ranging from mild symptoms to life-threatening anaphylaxis.
A food (or component of a food) that can trigger an immune reaction in sensitive people, ranging from mild symptoms to life-threatening anaphylaxis. An allergen is a substance the immune system mistakenly treats as a threat. In food, allergens are usually proteins found in specific foods such as peanuts, tree nuts, milk, egg, fish, crustacea, molluscs, soy, sesame, lupin and cereals containing gluten. Even tiny amounts can cause a reaction in a person who is allergic, and reactions can escalate quickly, so allergens are treated very differently from an ordinary preference or intolerance. In Australia the management of food allergens is driven by the Australia New Zealand Food Standards Code, administered by Food Standards Australia New Zealand (FSANZ). The Code sets out which allergens must be declared on labels and how, while food safety standards for handling and processing require businesses to control the risk that an allergen ends up in a food where it is not expected. Allergen management therefore has two halves: telling people what is in the food, and making sure only what is meant to be in the food actually is. For an Australian food business, treating allergens seriously means knowing exactly which of the declarable allergens are present across every ingredient and sub-ingredient you use, including things like sauces, spice blends, marinades and processing aids. Many businesses keep an allergen matrix that maps each menu item or product to the allergens it contains, and they train staff so anyone can answer an allergen question accurately rather than guessing. The practical goal is that a customer or a label reader always gets the truth. In packaged food this means correct labelling under the Code; in a cafe, restaurant or catering setting it means being able to state reliably what is in a dish and being honest when you cannot guarantee the absence of an allergen. Getting an allergen wrong is one of the most common causes of food recalls in Australia, so accuracy matters commercially as well as for safety. A suburban bakery lists a chocolate slice as containing milk and egg, but the choc chips it switched to also contain traces of tree nut and the label was never updated. A customer with a tree nut allergy reads the ingredient list, sees nothing to worry about, and has a reaction. The failure was not in the kitchen hygiene but in allergen information: the business did not track a changed ingredient through to the label.
Frequently asked questions
How is a food allergy different from a food intolerance?
A food allergy involves the immune system and can cause severe, rapid reactions including anaphylaxis, even to trace amounts. An intolerance (such as lactose intolerance) is usually digestive, dose-related and not life-threatening. Food businesses must manage declared allergens carefully because of the allergy risk.
Which allergens must Australian food businesses declare?
The Food Standards Code requires declaration of cereals containing gluten, crustacea, egg, fish, milk, peanuts, tree nuts, sesame, soy, lupin, added sulphites at 10 mg/kg or more, and molluscs. These are commonly called the declared or major allergens.
Do allergens have to be declared on unpackaged food?
Yes. When food is not required to carry a label (for example, food made and sold at a cafe or sold unpackaged), the allergen information must still be provided, either displayed with the food or given to the customer on request.
Can cooking destroy an allergen?
Generally no. Cooking, baking or heating does not reliably remove the risk, and some allergenic proteins remain active after processing. You cannot assume an allergen has been made safe by cooking, so it must still be declared and controlled.
What should staff do if they are unsure whether a dish contains an allergen?
Never guess. Staff should check the recipe, ingredient labels or the allergen matrix, or ask the customer to choose a dish that can be confirmed. If the absence of an allergen cannot be verified, the customer should be told clearly so they can decide.
