Systemic Lupus Erythematosus (SLE) is a complex autoimmune disease, that may attack many organ systems. Course of the disease is chronic and recurrent. Over the past forty years the number of SLE cases has tripled. One of the factors could affect SLE is Vitamin D. This research was conducted to analyze status of Vitamin D in SLE patients in the Regional General Hospital (RSUD) Arifin Achmad Ria…