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Vitamin D

Vitamin D is a topic covered in the Davis's Lab & Diagnostic Tests.

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General

Synonym/Acronym:
Cholecalciferol, vitamin D 1,25-dihydroxy.

Common Use:
To assess vitamin D levels toward diagnosing disorders such as vitamin toxicity, malabsorption, and vitamin deficiency.

Specimen:
Serum collected in a red-top tube. Plasma collected in a green-top (heparin) tube is also acceptable.

Normal Findings:
(Method: High-performance liquid chromatography)

FormConventional UnitsSI Units (Conventional Units × 2.496)
Vitamin D 25-hydroxy
DeficientLess than 20 ng/mLLess than 49.9 nmol/L
Insufficient20–30 ng/mL49.9–74.9 nmol/L
Optimal30–100 ng/mL74.9–249.6 nmol/L
Possible ToxicityGreater than 150 ng/mLGreater than 374.4 nmol/L
Conventional UnitsSI Units (Conventional Units × 2.6)
Vitamin D 1,25-dihydroxy18–72 pg/mL47–187 pmol/L

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Citation

Bladh, Mickey Lynn., and Anne M. Van Leeuwen. "Vitamin D." Davis's Lab & Diagnostic Tests, 7th ed., F.A. Davis Company, 2017. Nursing Central, nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425147/all/Vitamin_D.
Bladh ML, Van Leeuwen AM. Vitamin D. Davis's Lab & Diagnostic Tests. 7th ed. F.A. Davis Company; 2017. https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425147/all/Vitamin_D. Accessed April 23, 2019.
Bladh, M. L., & Van Leeuwen, A. M. (2017). Vitamin D. In Davis's Lab & Diagnostic Tests. Available from https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425147/all/Vitamin_D
Bladh ML, Van Leeuwen AM. Vitamin D [Internet]. In: Davis's Lab & Diagnostic Tests. F.A. Davis Company; 2017. [cited 2019 April 23]. Available from: https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425147/all/Vitamin_D.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Vitamin D ID - 425147 A1 - Bladh,Mickey Lynn, AU - Van Leeuwen,Anne M, BT - Davis's Laboratory & Diagnostic Tests UR - https://nursing.unboundmedicine.com/nursingcentral/view/Davis-Lab-and-Diagnostic-Tests/425147/all/Vitamin_D PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -