The Complement component 4 (C4) test is a blood test that measures the amount of the C4 protein in the serum. C4 is a key protein in the Classical Pathway of the Complement System, a major defense mechanism of the immune system.
The C4 test is vital because its consumption (low levels) is highly characteristic of diseases where the immune system forms circulating immune complexes (antibodies bound to antigens), particularly Systemic Lupus Erythematosus (SLE).
At Augmentum Diagnostics, an NABL-accredited lab in Delhi, we provide accurate Complement C4 testing, which is essential for diagnosing and monitoring autoimmune diseases and certain inherited deficiencies.
