Well, the role of Vitamin D in slowing down the progression of Multiple Sclerosis is turning out to be controversial and puzzling
We posted as recently as March 1, 2012
Now there came to our view a study of the fundamentals of the effect of Vitamin D on MS
That study concludes :”…correction of its deficiency may be useful during treatment of the disease…”
- The study discussed in  was published in February 2012, and consisted of a “double-blind randomized controlled trial.”
The study was on a small cohort of 35 ambulatory MS patients.
No mention was made of the type of MS: Relapsing Remitting (RRMS), Secondary Progressive (SPMS), Primary Progressive (PPMS)
- The study  is dated 2009, 3 years earlier. It consists of comparing MS patients level of forms of vitamin D in the blood serum, and noted that:
“[Vitamin D] levels in patients suffering relapse were lower than during remissions. and overall lower than in a control group not afflicted with MS… In contrast, primary progressive patients showed similar values to controls…”
- If vitamin D supplementation is going to be helpful at all, it would be in the prevention or early RRMS phase which are more about inflammation
- Supplementation of a nutrient for diseases lacking in that nutrient needs proof of success.
- Vitamin D supplementation during advanced SPMS and PPMS , which is more about neurodegeneration, might not be helpful since study  did not find a lower level of vitamin D in PPMS patients than in the non-MS group