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Vitamin D status in chronic fatigue syndrome/myalgic encephalomyelitis: a cohort study from the North-West of England.


ABSTRACT: OBJECTIVE:Severe vitamin D deficiency is a recognised cause of skeletal muscle fatigue and myopathy. The aim of this study was to examine whether chronic fatigue syndrome/myalgic?encephalomyelitis (CFS/ME) is associated with altered circulating vitamin D metabolites. DESIGN:Cohort study. SETTING:UK university hospital, recruiting from April 2014 to April 2015. PARTICIPANTS:Ninety-two patients with CFS/ME and 94 age-matched healthy controls (HCs). MAIN OUTCOME MEASURES:The presence of a significant association between CFS/ME, fatigue and vitamin D measures. RESULTS:No evidence of a deficiency in serum total 25(OH) vitamin D (25(OH)D2 and 25(OH)D3 metabolites) was evident in individuals with CFS/ME. Liquid chromatography tandem mass spectrometry (LC-MS/MS) analysis revealed that total 25(OH)D was significantly higher (p=0.001) in serum of patients with CFS/ME compared with HCs (60.2 and 47.3?nmol/L, respectively). Analysis of food/supplement diaries with WinDiets revealed that the higher total 25(OH) vitamin D concentrations observed in the CFS/ME group were associated with increased vitamin D intake through use of supplements compared with the control group. Analysis of Chalder Fatigue Questionnaire data revealed no association between perceived fatigue and vitamin D levels. CONCLUSIONS:Low serum concentrations of total 25(OH)D do not appear to be a contributing factor to the level of fatigue of CFS/ME.

SUBMITTER: Earl KE 

PROVIDER: S-EPMC5695299 | BioStudies | 2017-01-01

REPOSITORIES: biostudies

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