Complement C4

Complement C4


The Complement C4 test evaluates the level of Complement C4, a protein that helps your body fight infections and remove damaged cells. Abnormal C4 levels may indicate immune system activity, inflammation, or autoimmune conditions such as lupus. This test is commonly recommended to monitor immune health or investigate unexplained inflammation

Parameters Covered

Complement C4

What the Test Measures

This test measures the level of Complement C4 protein in your blood, which is part of your immune system. It helps assess immune function and detect inflammation, autoimmune disorders, or immune deficiencies.

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.