The Effects of Interferon Beta Combined With Vitamin D on Relapsing Remitting Multiple Sclerosis Patients

The investigators hypothesize that vitamin D supplementation may ameliorate interferon beta-induced flu-like symptoms, owing to reduced release and activity of the cytokines that are in correlation with this adverse event. Vitamin D supplementation may also positively affect injection site reactions due to its immunomodulatory effects. Vitamin D may also augment the therapeutic efficacy of interferon beta among multiple sclerosis (MS) patients. Vitamin D intake may influence melatonin levels of MS patients as they share the same nuclear receptor.