I also posted this at the Lupus Community.
While a clinical trial testing vitamin D supplements in multiple sclerosis patients is underway at Johns Hopkins and elsewhere, most of the evidence of its efficacy currently comes from animal studies.
Vitamin D may prevent or ease symptoms of MS according to results of a
PMCID: PMC3876241 -Free Article-
Hope this helps.
At the moment I have got Heat Intolerance, but the doctor said to get vitamin D, this comes from the sun, but if I go out int the sun it makes me too hot. Therefore, I am taking multi vitamin tablets for the immune system, as mine has been attacked.
Hope this helps x