IgE (Immunoglobulin E)

Immunoglobulin E (IgE) is a type of antibody produced by the immune system. Its primary role is to help the body respond to allergens, which are substances that can cause allergic reactions, like pollen or pet dander. When IgE encounters an allergen, it triggers the release of chemicals such as histamine, leading to symptoms like sneezing, itching, or swelling. While IgE is important for fighting off certain parasites, its overactivity can lead to allergies and asthma in some people. Essentially, IgE acts as a defender against threats, although sometimes it can mistakenly target harmless substances.