Description
C3 (Complement Component 3) and C4 (Complement Component 4) are proteins in the complement system, a critical part of your immune system. These proteins help your body identify and destroy pathogens and play an essential role in immune system activation.
Why the Test Is Important
- Diagnose autoimmune diseases such as lupus or rheumatoid arthritis
- Evaluate immune system function and monitor inflammatory conditions
- Identify deficiencies or overactivity in the complement system
Fasting: Not required.
