Vitamin D Dosing

Patient Information

Current Status

Risk Factors for Deficiency

Contraindications & Concerns

Resources & References

1. van Groningen L, Opdenoordt S, van Sorge A, Telting D, Giesen A, de Boer H. Cholecalciferol loading dose guideline for vitamin D-deficient adults. Eur J Endocrinol. 2010;162(4):805-811.Source of the loading dose formula used in this calculator.
2. Bordelon P, Ghetu MV, Langan R. Recognition and management of vitamin D deficiency. Am Fam Physician. 2009;80(8):841-846.AAFP overview of classification, risk factors, and treatment.
3. LeFevre ML, LeFevre NM. Vitamin D screening and supplementation in community-dwelling adults: common questions and answers. Am Fam Physician. 2018;97(4):254-260.AAFP guidance on screening utility and supplementation evidence.
4. Neutze D, Mounsey A, Davidson L. Pharmacologic therapy for vitamin D deficiency. Am Fam Physician. FPIN Clinical Inquiries.D3 vs D2 efficacy, dosing frequency, and recheck timing.
5. Sanders KM, Stuart AL, Williamson EJ, et al. Annual high-dose oral vitamin D and falls and fractures in older women. JAMA. 2010;303(18):1815-1822.Evidence for fall risk with high-dose bolus vitamin D in elderly.
6. Choosing Wisely Canada. Vitamin D tests: when you need them — and when you don't.Patient-facing guidance on appropriate vitamin D testing.