Medical experts believe fortifying Scotland's food supply with vitamin D could tackle high MS levels in the absence of regular sunshine.

Professor George Ebers of the Nuffield Department of Clinical Neurosciences at Oxford University believes that the evidence of the link between MS and vitamin D deficiency is strong and good enough to justify dosing the entire population with vitamin D.
However, Scotland's chief medical officer Sir Harry Burns said, "It is important to remember that dietary supplements can have harmful as well as positive consequences and recommendations need to be made on the basis of evidential benefit in well conducted randomized studies in large populations. Mass medication of the Scottish population without such evidence would be considered irresponsible by the public health community."
Source-Medindia