Complement C4, Serum
Fasting Required: No

Specimen: Blood

Results: 5-7 Business Days

The complement system is composed of more than 30 circulating blood proteins that work together to help antibodies fight off infections and destroy substances that are foreign to the body such as viruses, bacteria, and other germs. It’s also activated when the body makes antibodies against its own tissues that it views as foreign. Complement C3 is the most important and abundant protein in the complement system. Decreased C4 level is associated with acute systemic lupus erythematosis, glomerulonephritis, immune complex disease, cryoglobulinemia, congenital C4 deficiency and generalized autoimmune disease.


Reference Range(s):
16-47 mg/dL

Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

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