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Nutrients 2010, 2(5), 482-495; doi:10.3390/nu2050482

The Relationship between Ultraviolet Radiation Exposure and Vitamin D Status

Norwegian Institute for Air Research (NILU), The Polar Environmental Centre, NO-9296 Tromsø, Norway
Received: 1 March 2010 / Revised: 14 April 2010 / Accepted: 20 April 2010 / Published: 4 May 2010
(This article belongs to the Special Issue Feature Papers for Vitamins)
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This paper reviews the main factors influencing the synthesis of vitamin D, with particular focus on ultraviolet radiation exposure. On the global level, the main source of vitamin D is the sun. The effect of solar radiation on vitamin D synthesis depends to some extent on the initial vitamin D levels. At moderate to high latitudes, diet becomes an increasingly important source of vitamin D due to decreased solar intensity and cold temperatures, which discourage skin exposure. During the mid-winter season, these factors result in decreased solar radiation exposure, hindering extensively the synthesis of vitamin D in these populations.
Keywords: vitamin D; ultraviolet; UV; sun vitamin D; ultraviolet; UV; sun
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Engelsen, O. The Relationship between Ultraviolet Radiation Exposure and Vitamin D Status. Nutrients 2010, 2, 482-495.

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