Get Virtual Care
For Businesses
About Us
A member asked:
Are c3 and c4 just a snapshot or does a decline over time indicate an issue? c3 is low end normal and c4 is normal.
A doctor has provided 1 answer
Are you referring to: complement C3 and C4 levels? They are snapshots of what is going on with your immune system, but they tend not to vary much over a period of weeks. They are reliable indicators of immune efficiency, or deficiency if applicable, over a period of time. Hopefully you were not taking the test because of autoimmune reasons.
Answered 10/9/2015
2.2k views
Thank
Related Questions
A member asked:
I have a lupus overlap. My C3/C4 have always been low, but this month C4 is at its lowest while C3 is a low normal. Why would it increase? ESR is up.
2 doctors weighed in across 2 answers
A member asked:
What is the significance of having low serum levels of kappa and lambda free light chains? I had high ch50 and normal C3 and c4.
A doctor has provided 1 answer
A member asked:
Is it normal to have low C3&C4 serum? I had a positive ANA over five years ago also. Now just have low C3&4. Should I be worried? I have felt sick. TY
A doctor has provided 1 answer
A member asked:
My 14 yr. old daughter has a high ch50 level (lab work just says >60) with borderline low C4 (16) and normal c3(102) should i be concerned?
A doctor has provided 1 answer
A member asked:
Dx sle. My C3 is almost always low but my C4 is always normal. Have read sle has both low. Alternative pathway? Normal for lupus or misdiagnosis?
A doctor has provided 1 answer
People also searched for:
Complement C3 & C4 tests done 3 times. C3 normal but twice C4 was borderline normal or borderline low, 3rd time it was well within range. deficiency?
Complement C3 and C4 tests done 3 times due to lupus symptoms. C3 always normal but C4 borderline low twice, now normal. is this a deficiency?
What does it mean if my complement C3 serum was 4 points low on a scale of 90-180 and my C4 was normal? Could there be something wrong?
I have normal levels of complement C2 and c4. C3 level is low. Ch50 is high-normal(57 u/ml)-(all are serum tests)-what are the possible causes?
What does a test result for C3 low and C4 normal? C3 value is 11.69
Didn't find what you're looking for?
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your questionMore of what we treat
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HIPAASecure
SOC 2 Type 2Certified
JCAHOAccredited
Download HealthTap
Video visit and message your doctor
