Module 2 - Introduction

A food allergy is when the body’s immune system reacts unusually to specific foods, and the food the body reacts to is known as the allergen.  Most allergic reactions to food are mild, but some can be very serious.  The only way people can deal with a food allergy is to avoid the foods that make them ill. 

The science behind food allergy

Food allergies involve specific antibodies, mainly Immunoglobin E (IgE), in the immune system. For each food, the body manufactures a specific antibody. Immunoglobin E antibodies are designed to recognise and attack disease-causing substances such as pathogens and parasitic worms.

Allergic people have immune systems that are programmed to treat ordinary proteins from foods and other things as if they are a threat (for example cats, dogs, horses, insect stings, pollen etc.).

IgE is a two-stage process. The first stage of IgE mediated food allergy is sensitisation when the body recognises a particular substance as harmful but no symptoms are experienced. The second stage is where symptoms occur.

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