The Complement C4 test measures the level of complement component 4, a protein involved in the body’s immune and inflammatory responses. C4 is part of the complement system, which helps the immune system respond to infections and clear immune complexes.
This test is commonly used to evaluate and monitor autoimmune conditions such as systemic lupus erythematosus (SLE) and certain immune-mediated disorders. Abnormal C4 levels may indicate immune system activation or complement consumption. It is often ordered alongside Complement C3 to provide a more complete picture of immune system function.
Complement C4
The Complement C4 test measures the level of complement component 4, a protein involved in the body’s immune and inflammatory responses. C4 is part of the complement system, which helps the immune system respond to infections and clear immune complexes.
This test is commonly used to evaluate and monitor autoimmune conditions such as systemic lupus erythematosus (SLE) and certain immune-mediated disorders. Abnormal C4 levels may indicate immune system activation or complement consumption. It is often ordered alongside Complement C3 to provide a more complete picture of immune system function.
