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Low vitamin D concentrations may contribute to the increased risk of diabetes mellitus related to shift work
  1. William B Grant
  1. Correspondence to William B Grant, Sunlight, Nutrition and Health Research Center, PO Box 641603, San Francisco, CA 94164-1603, USA; wbgrant{at}

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The meta-analysis by Gan et al 1 found a slightly increased risk of diabetes mellitus (DM) for those doing shift work. Mechanisms given to explain the findings included disturbed sleep patterns, reduced amount of sleep and disruption of circadian rhythms. Other mechanisms included disturbed sociotemporal patterns leading …

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  • Competing interests WBG receives funding from Bio-Tech Pharmacal (Fayetteville, Arizona, USA), the Sunlight Research Forum (Veldhoven) and Medi-Sun Engineering, LLC (Highland Park, Illinois, USA).

  • Provenance and peer review Not commissioned; internally peer reviewed.

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