 [ Symptoms ] how much of an impact does vitamin d have on systemic lupus erythematosus sle and rheumatoid arthritis ra [ Disease ] vitamin d has been found to have effects on immune function and inflammation earlier studies suggested a relationship of vitamin d to autoimmune conditions a group of women within the nurses health study was targeted with food and vitamin questionnaires there was no apparent association between increasing vitamin d intake and the risk of developing these autoimmune disorders