test

COMPLEMENT 4 (C4)

The Complement 4 (C4) test measures the level of C4 protein, which is part of the immune system. This protein helps fight infections and clear damaged cells. Doctors often use this test to check for autoimmune diseases like lupus or to monitor inflammation in the body.

This page is informational and does not provide medical diagnosis or treatment advice. For medical concerns, please consult a qualified healthcare professional.