Intended for healthcare professionals

Letters Vitamin D supplements and disease prevention

Neglect or good practice? Authors’ reply to letters by Rhein and Degner

BMJ 2017; 356 doi: (Published 10 February 2017) Cite this as: BMJ 2017;356:j716
  1. Mark J Bolland, associate professor1,
  2. Alison Avenell, professor2,
  3. Andrew Grey, associate professor1
  1. 1Department of Medicine, University of Auckland, Auckland 1142, New Zealand
  2. 2Health Services Research Unit, University of Aberdeen, Aberdeen AB25 2ZD, Scotland
  1. m.bolland{at}

We wonder what compelled Rhein to accuse us of “condescending neglect” of northern Britain, especially given that one of us lives in northeast Scotland.12 She says that the evidence for vitamin D supplements is good enough for her, citing meta-analyses of randomised trials for patients in critical care, cancer mortality, and asthma.1 But these meta-analyses have substantial limitations that led their authors34 …

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