Skip to content
My WebMD Sign In, Sign Up

Lupus Health Center

C3 and C4 Complement

C3 and C4 Complement

C3 and C4 complement are parts of a group of globulin proteins found in the blood. Globulins carry substances through the bloodstream. C3 and C4 complement help the body's immune system react to inflammation and infection.

The results of the blood test for C3 and C4 complement help monitor the condition of people who have kidney disease (nephritis) or lupus. The results can also help diagnose angioedema, an allergic reaction.

Credits

ByHealthwise Staff
Primary Medical ReviewerAnne C. Poinier, MD - Internal Medicine
Specialist Medical ReviewerTushar J. Vachharajani, MD, FASN, FACP - Nephrology
Last RevisedMay 17, 2011

Today on WebMD

Lupus Overview Slideshow
Slideshow
sunburst filtering through leaves
Article
 
lupus medication
Article
Trainer demonstrating exercise for RA
Slideshow
 
Woman rubbing shoulder
Slideshow
Bag of cosmetics
Video
 
young woman hiding face
Quiz
biologics for ra
Slideshow
 
5 Lupus Risk Factors
Article
Young adult couple
Article
 
When Men Have Lupus
Video
sticky notes on face
Video
 

WebMD Special Sections