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What can lead to vitamin D deficiency?

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Vitamin D deficiency can occur for a number of reasons. For example, you may not consume the recommended levels of the vitamin over time. This is likely if you follow a strict vegan diet, because most of the natural sources are animal-based, including fish and fish oils, egg yolks, fortified milk, and beef liver.

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 exposure to sunlight lead to vitamin D deficiency?

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