An article published by Healthday reports on a new study in JAMA Neurology that has found a link between vitamin D and the progression of multiple sclerosis (MS). Researchers “measured vitamin D levels in 465 patients with signs of MS who took part in a trial designed to study interferon beta-1b treatment.” Patients then underwent MRI scans for 5 years to track brain lesions associated with the disease. Scans showed that increased levels of vitamin D were associated with a 57% lower risk of developing new brain lesions and 57% lower risk of relapse. Patients with higher levels of vitamin D also showed decreased lesion size and decreased atrophy of the brain. Although the findings were based on association, and not causation, they may have important implications for maintaining adequate vitamin D levels in MS patients.