United Kingdom (Great Britain)

A 21-year-old male asked:

Do serum complement levels naturally fluctuate? had one mildly low c4 with normal c3 but when test redone both had risen & c4 was within normal range

1 doctor answer • 1 doctor weighed in

Dr. Marsha Davisanswered

Internal Medicine 30 years experience

They do : Fluctuate somewhat but it sounds like yours are normal!

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3.9k viewsAnswered >2 years ago

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A 33-year-old male asked:

Can you have a normal ch50 (total complement) blood test result, but still have low C3 and/or C4 levels?...Or would low C3 or C4 show up on ch50 test?

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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.

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A 28-year-old female 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

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Last updated Jan 24, 2017

Found in:

Serum›Complement levels

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