منابع مشابه
Sun exposure and vitamin D sufficiency.
Ultraviolet radiation is a carcinogen that also compromises skin appearance and function. Because the ultraviolet action spectra for DNA damage, skin cancer, and vitamin D(3) photosynthesis are identical and vitamin D is readily available from oral supplements, why has sun protection become controversial? First, the media and, apparently, some researchers are hungry for a new message. Second, t...
متن کاملVitamin D status and sun exposure in southeast Asia
Vitamin D deficiency is more common in South Asia and Southeast Asia than is appreciated. Most studies defined 25-hydroxyvitamin D levels [25(OH)D] levels of less than 50 nmol/L (20 ng/mL) as vitamin D deficiency. With this cut-off level, the prevalence of vitamin D deficiency was about 70% or higher in South Asia and varied from 6-70% in Southeast Asia. The determinants for the variation of vi...
متن کاملVitamin D sufficiency in pregnancy.
One year ago, the chief medical officers of the United Kingdom recommended that “All pregnant and breastfeeding women should take a daily supplement containing 10 μg (400 IU) of vitamin D,” to counter the high prevalence of vitamin D deficiency in pregnant women. This was aimed at reducing the associated consequences of deficiency, such as rickets in children and osteomalacia in adults. In a li...
متن کاملSun exposure , vitamin D and immune function - where to now ?
Exposure of the skin to UV radiation causes local and systemic immunosuppression through vitamin D and non-vitamin D pathways. This has implication for skin cancer development, autoimmune diseases and vaccination. New studies are exploring the clinical and public health importance of UV-induced immune suppression.
متن کاملVitamin D status and sun exposure in India
BACKGROUND Little if any cutaneous production of vitamin D3 occurs at latitudes above and below 35° N and 35° S during the winter months. It was postulated that those residing in tropics synthesize enough vitamin D3 year round. Several studies have documented the effect of latitude, season and time of the day on the cutaneous production of vitamin D3 in an ampoule model. Studies from India have...
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ژورنال
عنوان ژورنال: The American Journal of Clinical Nutrition
سال: 2008
ISSN: 0002-9165,1938-3207
DOI: 10.1093/ajcn/88.2.570s