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- W2053839779 abstract "<b><i>Background:</i></b> Whether dark skin produces less vitamin D after UVB radiation than fair skin remains controversial. <b><i>Objective:</i></b> To compare 25-hydroxyvitamin D [25-(OH)-D] levels after a single UVB exposure in fair (phototype II-III) and black-skinned (phototype VI) volunteers. <b><i>Methods:</i></b> Fair-skinned volunteers (n = 20, 4 males/16 females, mean age: 23.2 years) and black-skinned (n = 11, 6 males/5 females, mean age: 23.8 years) received a single total body UVB exposure (0.022 J/cm<sup>2</sup>). The 25-(OH)-D levels were measured on days 0, 2 and 6. <b><i>Results:</i></b> On day 0, all volunteers were severely vitamin D deficient. On day 2, 25-(OH)-D levels of fair-skinned volunteers increased significantly (median: 11.9-13.3 ng/ml, p < 0.0001), but not in black-skinned people (median: 8.60-8.55 ng/ml, p = 0.843). Again, on day 6, 25-(OH)-D levels of fair-skinned volunteers increased significantly (median: 11.9-14.3 ng/ml, p < 0.0001), but not in black-skinned people (median: 8.60-9.57 ng/ml, p = 0.375). <b><i>Conclusion:</i></b> This study suggests that skin pigmentation negatively influences vitamin D synthesis." @default.
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- W2053839779 date "2013-01-01" @default.
- W2053839779 modified "2023-09-30" @default.
- W2053839779 title "Skin Color Is Relevant to Vitamin D Synthesis" @default.
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- W2053839779 doi "https://doi.org/10.1159/000354750" @default.
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