2006
DOI: 10.1590/s0004-27302006000400009
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Vitamin D deficiency: a global perspective

Abstract: Vitamin D is essential for the maintenance of good health. Its sources can be skin production and diet intake. Most humans depend on sunlight exposure (UVB 290-315 nm) to satisfy their requirements for vitamin D. Solar ultraviolet B photons are absorbed by the skin, leading to transformation of 7-dehydrocholesterol into vitamin D3 (cholecalciferol). Season, latitude, time of day, skin pigmentation, aging, sunscreen use, all influence the cutaneous production of vitamin D3. Vitamin D deficiency not only causes … Show more

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Cited by 135 publications
(119 citation statements)
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“…Results from the present study are consistent with published studies suggesting that female sex is one of the most common risk factors associated with vitamin D deficiency and insufficiency in developing countries (7,8,17,(19)(20)(21) . This could be due to the fact that women tend to spend more time indoors than men, in addition to their style of clothing and sun protection and sun avoidance attitude, which could all attribute to the vitamin D deficiency in Bahraini women.…”
Section: Discussionsupporting
confidence: 92%
“…Results from the present study are consistent with published studies suggesting that female sex is one of the most common risk factors associated with vitamin D deficiency and insufficiency in developing countries (7,8,17,(19)(20)(21) . This could be due to the fact that women tend to spend more time indoors than men, in addition to their style of clothing and sun protection and sun avoidance attitude, which could all attribute to the vitamin D deficiency in Bahraini women.…”
Section: Discussionsupporting
confidence: 92%
“…There is no consensus on the ideal serum concentration of 25(OH)D and there are many suggested values for setting the lower limit of normality from 20 to as much 37 ng/mL (14,15,22,23). Therefore the level of vitamin D should be the one that does not induce a rise in parathyroid hormone (PTH), and the optimal serum 25(OH)D concentrations have yet to be established (14,15,22,23).…”
Section: Possible Mechanisms Of Vitamin D Deficiency In Hiv-infected mentioning
confidence: 99%
“…Therefore the level of vitamin D should be the one that does not induce a rise in parathyroid hormone (PTH), and the optimal serum 25(OH)D concentrations have yet to be established (14,15,22,23). It is not surprising that discordant results are obtained because these laboratories use substantially different methodology for measurement of 25(OH)D, which, to this time, has not been standardized (14,15,22,23).…”
Section: Possible Mechanisms Of Vitamin D Deficiency In Hiv-infected mentioning
confidence: 99%
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“…Es evidente que la dieta no cubre los requerimientos en vitamina D; sin embargo, la fuente más importante de ésta debe proceder de la transformación de la provitamina de la piel en colecalciferol, por la acción de las radiaciones solares. La creciente preocupación por el riesgo de cáncer de piel ligado a la exposición solar ha propiciado una verdadera pandemia de déficit en vitamina D, que sin duda influirá en la obtención de un adecuado PMO 44,45 . Por esto, la AAP duplicó recientemente las recomendaciones de vitamina D dadas en 2003 46 .…”
Section: Article In Pressunclassified