Vitamin D has been associated with fibromyalgia and chronic widespread pain in multiple studies and case reports, but few doctors treat patients with Vitamin D due to the lack of quality studies showing that Vitamin D is effective. The first randomized controlled trial of Vitamin D for fibromyalgia was just recently published. Researchers took patients with fibromyalgia who had levels of Vitamin D less than 32ng/ml and randomized them to either Vitamin D or a placebo. After 24 weeks, the Vitamin D group had a marked reduction in pain, improved physical function, and a decrease in fatigue.
If you have fibromyalgia or widespread pain consider talking to your doctor about checking your Vitamin D levels.