Diagnostics·Diagnostics
Total IgE test
Informed by recognized medical guidance
Overview
The total IgE test measures the amount of immunoglobulin E (IgE) in your blood. IgE is a protein made by your immune system that plays a role in allergic reactions and fighting parasites. This test is often used to help diagnose allergies, asthma, and other conditions linked to high IgE levels.
Key facts
- IgE is one of five types of antibodies that help your body defend against infections.
- High IgE levels can point to allergies, asthma, eczema, or certain infections.
- Low IgE levels are usually not a concern, but very low levels can sometimes suggest a weakened immune system.
The total IgE test is a routine blood test used internationally. Elevated IgE is relatively common in people with allergies or asthma.
Anyone can have a total IgE test. It is often requested for people who have symptoms of allergies, asthma, or unexplained high levels of eosinophils (a type of white blood cell).