Get your rays. Here's the HOLISM study: "We detected significant associations between latitude, deliberate sun exposure and vitamin D supplementation and health outcomes of this large group of people with MS. Vitamin D is likely to have a key role in these associations and its role in the health outcomes of people with MS urgently requires further study." http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4525738/

A growing evidence base implicates vitamin D, sun exposure and latitude in the aetiology of multiple sclerosis (MS), however there are less data on the associations of these variables with disease outcomes.We undertook a cross-sectional survey of over ...