Norwegian Institute for Air Research, The Polar Environmental Centre, NO-9296 Tromsø, Norway.
Nutrients. 2010 May;2(5):482-95. doi: 10.3390/nu2050482. Epub 2010 May 4.
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.
本文综述了影响维生素 D 合成的主要因素，特别关注了紫外线辐射暴露。在全球范围内，维生素 D 的主要来源是太阳。太阳辐射对维生素 D 合成的影响在一定程度上取决于初始维生素 D 水平。在中高纬度地区，由于太阳强度减弱和寒冷的气温降低了皮肤暴露的机会，饮食成为维生素 D 的一个越来越重要的来源。在仲冬季节，这些因素导致太阳辐射暴露减少，严重阻碍了这些人群中维生素 D 的合成。
