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How can exposure to sunlight lead to vitamin D deficiency?

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Because the body makes vitamin D when your skin is exposed to sunlight, you may be at risk of deficiency if you are homebound, live in northern latitudes, wear long robes or head coverings for religious reasons, or have an occupation that prevents sun exposure.

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 can dark skin lead to vitamin D deficiency?

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