Your immune system sees a certain food or food item as hazardous when you have a food allergy. Cells release immunoglobulin E (IgE), a response from your immune system, to neutralise the allergen-causing food or food item (the allergen).
A material that can trigger an allergic reaction is known as an allergen. The immune systems of some individuals see allergens as foreign or threatening. The immune system subsequently responds by producing an IgE antibody to offer protection against the allergen.
As a result, food allergens are often foreign particles that the immune system interprets as dangerous.
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