Partner with Getlabs to collect diagnostics at home. Learn More
A C4 and C3 complement blood test is a type of test that measures the levels of C4 and C3, which are proteins that are part of the complement system in the blood. The complement system is a group of proteins that work together to help the immune system fight infection and inflammation. This test is commonly ordered to help diagnose and monitor autoimmune disorders, such as lupus and rheumatoid arthritis, and to evaluate the effectiveness of treatment for these conditions.
This page is provided for educational and informational purposes only and does not constitute the provision of medical advice or professional services. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice regarding any of the tests and conditions referenced above are advised to consult with a licensed clinician. Always seek the advice of your qualified health provider regarding a medical condition and do not disregard professional medical advice or delay in seeking it because of any information on this page. If you think you may have a medical emergency, immediately call 911 or go to the nearest urgent care center or hospital.
