I do not have a diagnosis of MS, but my doctor told me to take 5,000 ius of Vit D3 daily PLUS spend time in the sun daily.
It works well for me on a number of levels including reduced inflammation. I get my vitamin D3 at Sam's Club, less than $5.00 for 400 ct D3 1,000s.
mjh
See what's free at AOL.com.