Kelly Pritchett, PhD, registered dietitian, Central Washington University, Ellensberg, WA.
Clifford Rosen, MD, director of clinical and translational research and senior scientist, Maine Medical Center Research Institute, Scarborough.
Irina Todorov, MD, Center for Integrative Medicine, Cleveland Clinic.
The Lancet: Diabetes Endocrinology: “Effects of vitamin D supplementation on musculoskeletal health: a systematic review, meta-analysis, and trial sequential analysis.”
Cleveland Clinic: “Vitamin D Vitamin D Deficiency.”
Annals of Oncology: “Vitamin D supplementation and total cancer incidence and mortality: a meta-analysis of randomized controlled trials.”
New England Journal of Medicine: “Vitamin D Supplements and Prevention of Cancer and Cardiovascular Disease.”
NIH Office of Dietary Supplements: “Unit Conversions.”
Journal of the American Medical Association: “Trends in Use of High-Dose Vitamin D Supplements Exceeding 1000 or 4000 International Units Daily, 1999-2014.”
U.S. Preventive Services Task Force: “Final Recommendation Statement: Vitamin D Deficiency: Screening.”