Individual test · Labcorp 140914

Interleukin-4, Serum

This test measures the level of Interleukin-4 (IL-4), a protein your immune system uses to send signals between cells. It helps show how your body regulates inflammation and is closely linked to the development of allergies and asthma. Doctors use this measurement to determine if an immune reaction is driven by allergy-related processes rather than other causes. However, this test cannot diagnose a specific condition or identify a specific allergen by itself.