C1 Esterase Inhibitor

C1 Esterase Inhibitor


The C1 Esterase Inhibitor test measures the level of a specific protein involved in regulating inflammation and immune responses in the body. Low or dysfunctional levels can lead to episodes of swelling in areas such as the face, throat, hands, feet, or abdomen — a condition known as hereditary angioedema. This test is usually recommended for individuals experiencing recurrent, unexplained swelling without itching or hives. Early diagnosis can help guide appropriate treatment and prevent complications.

Parameters Covered

C1 Esterase Inhibitor

What the Test Measures

This test measures the level of C1 esterase inhibitor protein in your blood. It helps determine whether your immune system is properly regulating inflammation and fluid balance, particularly in cases of unexplained or recurrent swelling.

Turnaround Time for Results


Leicester: Most results are available within 1–2 working days (some tests may take longer)
Outside Leicester: Results are typically available within 2–4 working days (some tests may take longer)
Certain parameters: Some specialised tests may take 2–3 weeks to process.

How Results Are Delivered

Your personalised report will be securely sent to your registered email address.