Intended for healthcare professionals

Letters Vitamin D supplements and disease prevention

Vitamin D supplements: don’t forget depression and cognitive impairment

BMJ 2016; 355 doi: (Published 30 December 2016) Cite this as: BMJ 2016;355:i6711
  1. Detlef Degner, senior psychiatrist
  1. Department of Psychiatry, University of Goettingen, D-37075 Goettingen, Germany
  1. ddegner{at}

Bolland and colleagues describe the role of vitamin D supplementation and the insufficient studies published in recent years.1 Observational studies have associated low vitamin D status with a wide range of non-skeletal adverse clinical outcomes. But meta-analyses of randomised controlled trials show that vitamin D supplementation alone does not improve …

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