What is a Complement Blood Test? Why is the test done? Everything around this, that you should know, in this post and of course our doctors are always there to help you. Just fill in your details in the form down below and we will answer all your questions for FREE!
It measures the amount and the activity of complement proteins. These are part of the complement system. There are nine complement proteins labelled as C1 to C9. They are important for the immune system to fight against the harmful substances entering the body like viruses and bacteria. C3 and C4 are the major complement proteins.
If you have abnormal C3 or C4 levels, it indicates you don’t have enough complement proteins to work with the immune system to fight against inflammation. There could be an autoimmune disorder or any other health disorder.
This test measures the amount of C3 protein present in the blood.
The units of measurement of C3 proteins are mg/dl (milligrams per deciliters) or g/l (grams per litre)
The normal range is 75 mg/dl to 175 mg/dl or 0.75 g/l or 1.75 g/l
They play a significant role in the immune system as:
You should get it done if you have the symptoms indicating autoimmune disorders like lupus:
In case of any underlying disease, it also helps in monitoring the treatment procedure to see if it is going right or not.
A high level of C3 is seen in cases of infections or injury. It may indicate:
It may be hereditary or acquired. A low level of complement C3 can be a sign of:
It measures the activity of the C4 protein in relation to other proteins present in the complement system.
The units of measurement of C3 proteins are mg/dl (milligrams per deciliters) or g/l (grams per litre)
The normal range is 16 mg/dl to 48 mg/dl or 0.16 g/l or 0.48 g/l
The increase or decrease in C4 levels is indicated in the same way as that of C3 proteins:
Low C4 levels:
It could be a sign of autoimmune disorders like rheumatoid arthritis, lupus, cirrhosis, and kidney diseases.
High C4 levels:
It is generally high after an injury or infection.
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** The text on this website is sourced from websites like emedicine and/or other verified material by government agencies around the globe along with valuable inputs and additions by our team. The content of this page is proofread and updated by the team of doctors, every once in a while, to provide the most accurate information.
