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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Vitamin D and respiratory tract infections ： ウィキペディア英語版 Vitamin D and respiratory tract infections A link between vitamin D and respiratory tract infections has been hypothesised. According to the hypothesis, vitamin D deficiency may predispose to infection. Evidence supporting the hypothesis derives from some scientific studies and the observation that outbreaks of respiratory infections occur predominantly during months associated with lower exposure to the sun. Evidence against the hypothesis has also been reported. The Institute of Medicine concluded in a 2011 report that the existing data were "not consistently supportive of a causal role" for the vitamin in reducing the risk of infection. ==Ultraviolet radiation and vitamin D== An inverse association between exposure to the sun and upper respiratory tract infections was first proposed in 1926 by Smiley, who theorized that seasonality of infection was caused by “disordered vitamine metabolism in the human...directly due to a lack of solar radiation during the dark months of winter.”〔Smiley DF. (Seasonal factors in the incidence of the acute respiratory infections. ) Am J Hyg 1926;6:621-6, p. 626〕 Studies of Dutch and Russian〔Gigineĭshvili GR, Il’in NI, Suzdal’nitskiĭ RS, Levando VA. The use of UV irradiation to correct the immune system and decrease morbidity in athletes (Russian ). Vopr Kurortol Fizioter Lech Fiz Kult 1990 May-Jun:30-3.〕 subjects have also indicated a correlation of ultraviolet light exposure and relative absence of infection. However, the seasonality of infections such as influenza may also be explicable by other factors. For example, low absolute humidity favours the survival of the influenza virus.A review by authors from the University of Maryland School of Pharmacy suggested that while low-dose vitamin D supplementation was unlikely to be harmful, "sensible sun exposure" was "an inexpensive and enjoyable way" to ensure healthy levels of vitamin D. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Vitamin D and respiratory tract infections」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.