C4- Complement 4

4.6 (5 reviews)

C4 Complement test measures Complement 4 protein levels to evaluate immune system activity and autoimmune disorders.

₹499.00 ~~₹1000.00~~

Book Now Upload Prescription

Test Details

Also Known As

Complement C4 Test, C4 Complement Protein Test, Serum C4 Level Test, Complement System Test, Autoimmune Complement Test

Sample Type

Venous blood (serum)

Gender

Male, Female

Age Group

All Ages

Pathology

Test Code

The C4 – Complement 4 test measures the level of Complement component 4, a protein that plays a crucial role in the classical complement pathway of the immune system. Complement proteins help the body fight infections and clear immune complexes.

Reduced C4 levels are commonly seen in autoimmune diseases such as systemic lupus erythematosus (SLE), immune complex–mediated vasculitis, and hereditary angioedema. Elevated levels may be observed in acute inflammation or infection. The C4 test is usually interpreted along with C3 complement levels and other autoimmune markers to assess immune activity and disease progression.

Recommended Tests

Frequently Asked Questions

It measures the level of Complement 4 protein in the blood.

It may indicate autoimmune diseases like SLE or hereditary angioedema.

High levels may be seen in inflammation or acute infections.

No, fasting is not required.

Together, they provide a better assessment of complement system activity.

No, it is usually ordered when immune or autoimmune disorders are suspected.

C4- Complement 4