Aim This review aims to synthesise the evidence regarding any association between vitamin D deficiency and fibromyalgia, addressing whether general practitioners should be testing and treating these patients for vitamin D deficiency.
Discussion The evidence for an association between fibromyalgia and vitamin D deficiency is inconclusive, with no improvement in pain on supplementation. However, patients with concurrent risk factors for deficiency should be tested and treated for vitamin D deficiency to minimise osteoporosis risk and maximise muscular strength.
Results There were conflicting results in the cross sectional studies obtained, with no association in studies using control groups and mixed results in larger population based studies. One adequately powered randomised controlled trial suggests fibromyalgia pain is not improved by vitamin D supplementation.
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