Is C4 low in lupus?
Is C4 low in lupus? Low complement C4 levels are most commonly found in lupus (systemic lupus erythematosus), an autoimmune disease where the immune system attacks the body’s own tissues [9, 10]. Patients with lupus can have persistently low C4 levels (< 10 mg/dL). Why is C4 low in SLE? Lupus patients usually have low […]