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How is vitamin D deficiency diagnosed?

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The most accurate way to measure how much vitamin D is in your body is the 25-hydroxy vitamin D blood test. A level of 20 nanograms/milliliter to 50 ng/mL is considered adequate for healthy people. A level less than 12 ng/mL indicates vitamin D deficiency.

From: Vitamin D Deficiency WebMD Medical Reference

SOURCES:

Institute of Medicine: "Dietary Reference Intakes for Calcium and vitamin D."

Office of Dietary Supplements: "Dietary Supplement Sheet: Vitamin D."

Melamed M. , August 2008. Archives of Internal Medicine

News release, Peninsula Medical School News.

WebMD Health News: "Low Vitamin D Linked to Severe Asthma."

Garland C.F.  , July 2009. Annals of Epidemiology

MedlinePlus: "25-hydroxy Vitamin D Test."

Harvard School of Public Health: "Vitamin D: How Much Is Enough?"

Reviewed by Christine Mikstas on May 16, 2018

SOURCES:

Institute of Medicine: "Dietary Reference Intakes for Calcium and vitamin D."

Office of Dietary Supplements: "Dietary Supplement Sheet: Vitamin D."

Melamed M. , August 2008. Archives of Internal Medicine

News release, Peninsula Medical School News.

WebMD Health News: "Low Vitamin D Linked to Severe Asthma."

Garland C.F.  , July 2009. Annals of Epidemiology

MedlinePlus: "25-hydroxy Vitamin D Test."

Harvard School of Public Health: "Vitamin D: How Much Is Enough?"

Reviewed by Christine Mikstas on May 16, 2018

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How is vitamin D deficiency treated?

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