Allergies Guides

Allergy blood testing looks for specific antibodies, usually IgE, that the immune system produces in response to foods, pollen, pets, mold, and other triggers. A single test targets one allergen, while panels group several related allergens together.

Allergy results are reported as concentrations that a clinician interprets alongside your symptoms and history. A positive result alone does not always mean you have an allergy, and a negative result does not always rule one out.

A blood test measures sensitization, meaning the presence of antibodies, rather than the severity of a reaction. That is why results are always considered together with when and how symptoms appear.

Some allergens are tested individually while others are bundled into panels, and choosing between them usually depends on your symptoms and history. Each guide explains what the test detects, which sample type is used, and what a result can and cannot tell you.

Results are typically returned through a secure portal, and reference ranges for IgE tests vary by laboratory and method. If you have a history of severe reactions, work with a professional rather than relying on self-testing.

These guides are educational only and are not medical advice. If you have a history of severe reactions, seek professional care and do not rely on self-testing to manage a known allergy.