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

To view the entire topic, please or purchase a subscription.

Nursing Central is the award-winning, complete mobile solution for nurses and students. Look up information on diseases, tests, and procedures; then consult the database with 5,000+ drugs or refer to 65,000+ dictionary terms. Explore these free sample topics:

Nursing Central

-- The first section of this topic is shown below --


Cholecalciferol, vitamin D 1,25-dihydroxy.

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

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

-- To view the remaining sections of this topic, please or purchase a subscription --


* When formatting your citation, note that all book, journal, and database titles should be italicized* 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 - PB - F.A. Davis Company ET - 7 DB - Nursing Central DP - Unbound Medicine ER -