Complement
Also known as: C3; C4; Total Complement; CH50; CH100; Total Hemolytic Complement Activity
Formal name: Complement Activity; Complement Component C3; Complement Component C4
At a Glance
Why Get Tested?
To determine whether deficiencies or abnormalities in the proteins that are part of the complement system are contributing to increased infections or increased autoimmune activity; to monitor the activity of autoimmune diseases
When to Get Tested?
When you have recurrent microbial (usually bacterial) infections, unexplained inflammation or edema, or symptoms related to an autoimmune disorder; to help monitor an acute or chronic condition that affects the complement system
Sample Required?
A blood sample drawn from a vein in your arm
Test Preparation Needed?
None
