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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

The Physiological economy of vitamin D  [1983]

Fraser, David R.;

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Recent literature findings concerning the role of the liver in determining the efficiency of utilization of vitamin D through a balance of anabolic and catabolic processes are reviewed and discussed. Special consideration is given to: the question of vitamin D as a nutritional factor; the earlier misconception of an enterohepatic circulation that conserves vitamin D secreted into bile; and the causes of vitamin D deficiency. It is concluded that hepatic metabolism of vitamin D along anabolic or catabolic pathways offers explanations of induced vitamin D deficiency. Factors other than sunlight (e.g., diet) may play a role in clinical vitamin D deficiency. Oral supplementation of vitamin D is ineffective, unnatural, and possibly dangerous; hence, a means of supplying vitamin D in cases of inadequate exposure to sunlight is needed. (wz)
From the journal
Lancet (USA)
ISSN : 0099-5355

Bibliographic information

Language:
English
Type:
Directory
In AGRIS since:
1985
Volume:
1
Issue:
8331
Start Page:
969
End Page:
972
All titles:
"The Physiological economy of vitamin D"@eng
Other:
"Includes 60 references. Literature review"
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Bibliographic information

Language:
English
Type:
Directory
In AGRIS since:
1985
Volume:
1
Issue:
8331
Start Page:
969
End Page:
972
All titles:
"The Physiological economy of vitamin D"@eng
Other:
"Includes 60 references. Literature review"