Immunoglobulin E

This test measures the total amount of immunoglobulin E (IgE), an antibody involved in allergic responses and the body’s defense against certain parasites. Higher levels may occur with allergic conditions such as eczema, allergic asthma, or hay fever, as well as some parasitic infections and other conditions. Total IgE does not identify which substances you are allergic to or predict how severe an allergic reaction may be. An elevated result does not confirm an allergy, and a normal result does not rule one out.