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Comment & Response
February 14, 2019

Role of Monthly High-Dose Vitamin D Supplementation in Cancer Prevention

Author Affiliations
  • 1Texas Tech University Health Sciences Center, School of Medicine, Lubbock
  • 2Department of Public Health, Texas Tech Health Science Center, Lubbock
JAMA Oncol. 2019;5(4):572. doi:10.1001/jamaoncol.2018.7214

To the Editor Scragg et al1 address an issue of major current interest—the role of vitamin D in cancer prevention. We commend the authors for acknowledging several confounding factors in their study that could nullify any association between vitamin D and cancer incidence.1 These factors include the proportion of participants (approximately 25%) with vitamin D deficiency.1

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