C3 & C4 Complement Panel

This test helps in measuring the level of complement 3 and 4 proteins which are a part of complement system. This system works with the immune system and the abnormal level of these proteins is an indication of autoimmune disorders. It is used to diagnose autoimmune diseases such as lupus and rheumatoid arthritis. You may need this test if you have symptoms such as rashes, fatigue, mouth sores, hair loss, chest pain, joint pain, and fever. The test is also used to check the treatment efficacy of lupus or other autoimmune disorder.