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.
how much of an impact does vitamin d have on systemic lupus erythematosus (sle) and rheumatoid arthritis (ra)?