Immunoglobulins IgE (immunoglobulin E) are important antibodies whose main role is related to allergic reactions in the immune system.

When the body is exposed to an allergen, the immune system produces specific IgE antibodies that interact with mast cells and basophils. This process triggers the release of chemicals such as histamine, which is responsible for allergy symptoms such as inflammation and hypersensitivity. IgE is also involved in fighting parasitic infections. IgE levels can be measured with a blood test that, although it does not identify the specific allergen causing the reaction, can help diagnose allergies and immune disorders.