Complement Factor C4 Concentration Determination

What is it?
C4 – is another complement system protein. Its concentration in the blood can increase or decrease depending on the body's immune response.

How is it performed?
The test is performed from venous blood. It is combined with other immunological indicators – C3c, ANA, CRP.

When is it recommended?

• Suspecting autoimmune diseases (e.g., lupus, vasculitis);
• Evaluating acute or chronic inflammation;
• Monitoring the course and effect of treatment on immune diseases.

Benefits:
The C4 indicator helps assess how actively the immune system is functioning and whether there is pathological complement activity. It is an important indicator in the diagnosis and monitoring of chronic autoimmune diseases.