…in a randomized controlled trial out of Iran earlier this year, vitamin D supplementation of 50,000 IU/week delayed onset in all 13 patients taking vitamin D…
http://www.vitamindcouncil.org/vitamin-d-news/new-study-underway-on-vitamin-d-and-early-stage-multiple-sclerosis/
Reminder, the doctor in Brazil uses 20,000 to 150,000 IU vitamin D every day to cure MS.