What are Allergies?

Allergy is defined as an immune response by the body to a substance to which it has become hypersensitive. Allergies are typically divided into 2 categories: environmental and food.

Allergies occur when the immune system overreacts to harmless substances and repeated exposure to allergens will lead to inflammation, which can cause both immediate symptoms as well as chronic problems.

Allergies are expressed in the immune system by immunoglobulin E (lgE) and its detection.