Define the role of Immunoglobin E in Food Allergy?

Immunoglobin E (IgE) helps to eliminate parasites (helminthes) and is responsible for classic allergic reactions commonly referred to as food hypersensitivity or food allergy a reaction that occurs when the immune system reacts to the normally harmless food protein that the body has erroneously identified as harmful. We classify this immune reaction, therefore, as the IgE-mediated reaction. In fact, the immune reactions are classified into four types: Type I, Type II, III which are antibody dependent and Type IV which is T-cell dependent.

Table: Types of allergic reactions