Diagnostic test
COMPLEMENT 4 (C4)
About test
What does COMPLEMENT 4 (C4) measure?
The Complement 4 (C4) test measures the level of C4, a protein that is part of the body’s complement immune system. It may be used to help assess immune system activity, inflammation, or conditions in which complement proteins may be reduced or consumed. Healthcare professionals may order it alongside other complement tests when evaluating certain autoimmune, inflammatory, or recurrent infection-related concerns.
This overview is educational. Use the recorded preparation, sample and lab-partner details below for collection guidance, and confirm any missing information before collection.
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Prices, report times and availability are shown from the catalog records for each eligible partner.
Thyrocare
- Sample for analysis
- Confirm with the collection team
- Report time
- To be confirmed
Preparation and specimen requirements can vary by test and laboratory. Follow the instructions shown for your selected partner and any advice from your healthcare professional.