Higher levels of 25-hydroxyvitamin D are associated with a lower incidence of multiple sclerosis only in women

Introduction Multiple sclerosis (MS) is a chronic inflammatory disease with an as yet not fully understood etiological background. The geographical distribution of MS is striking with a prevalence that increases with latitude. For this reason, vitamin D deficiency is considered a possible pathogenic co-factor in MS. Materials and methods To study the role of the vitamin D metabolism in MS, blood samples wer