Sayre R M, Dowdy J C, Shepherd J G
Division of Dermatology, Department of Medicine, University of Tennessee Center for the Health Sciences, Memphis, TN 38104, USA.
J Steroid Biochem Mol Biol. 2007 Mar;103(3-5):686-8. doi: 10.1016/j.jsbmb.2006.12.062. Epub 2007 Feb 12.
As early as 1930 sunlamps claiming to provide ultraviolet (UV) exposure to make vitamin D were sold to the public in the US and Canada for home use. Today even with dietary supplementation of vitamin D many people do not get enough solar UV exposure to maintain sufficient vitamin D levels. There is growing interest in the availability of sunlamps for this purpose. The original Sperti Sunlamp, with label claiming vitamin D benefit was approved by the American Medical Association in 1940 as a sunlamp. This intermediate pressure mercury lamps ultraviolet B emission lines, at 297, 302, and 313 nm are able to convert 7-dehydrocholesterol in the skin to vitamin pre-D3 initiating the natural process of vitamin D formation. Today's KBD Vitamin D lamp, an updated model of the earlier type source. In order to comply with modern safety guidance, the source is filtered to remove unnecessary UVC radiation and is equipped with a timer to control the dose administered. The 5 min timer provides an exposure, at 20 in. from the user's skin, of one standard erythemal dose (SED). The SED represents a suberythemal dose for even the most sensitive skin type I individual.
早在1930年，声称能通过紫外线照射来合成维生素D的太阳灯就在美国和加拿大向公众出售以供家庭使用。如今，即便通过饮食补充维生素D，许多人仍未获得足够的太阳紫外线照射以维持充足的维生素D水平。人们对用于此目的的太阳灯的关注度日益增加。最初的Sperti太阳灯，其标签宣称有维生素D益处，于1940年被美国医学协会批准为太阳灯。这种中压汞灯在297、302和313纳米处的紫外线B发射线能够将皮肤中的7-脱氢胆固醇转化为维生素前D3，启动维生素D形成的自然过程。如今的KBD维生素D灯是早期型号光源的升级版。为了符合现代安全指南，该光源经过过滤以去除不必要的UVC辐射，并配备了定时器来控制照射剂量。5分钟定时器在距离使用者皮肤20英寸处提供一次标准红斑剂量（SED）的照射。即使对于最敏感的I型皮肤个体，SED也代表着亚红斑剂量。
