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NTIS 바로가기대한지역사회영양학회지 = Korean journal of community nutrition, v.20 no.2, 2015년, pp.120 - 128
윤진숙 (계명대학교 식품영양학과) , 송민경 (계명대학교 식품영양학과)
Objectives: The purpose of this study was to examine the relative impact of seasonal differences and age on dietary vitamin D intakes, outdoor activity time and serum vitamin D status among Korean postmenopausal women. Methods: A cross-sectional study was conducted with 164 free-living postmenopausa...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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비타민 D 체내상태를 양호하게 유지하기 위해 어떤 측면들을 고려해야 하는가? | 비타민 D는 다른 영양소와 달리 인체가 필요로 하는 양을 식사 섭취에만 의존하지 않고 피부에서 합성하여 공급할 수 있다. 따라서 비타민 D 체내상태를 양호하게 유지하려면 식사섭취 뿐만이 아니라 피부에서 비타민 D 합성에 영향을 미치는 일광 노출 정도의 계절적 또는 지리적 차이, 체격, 칼슘상태 등에 이르기까지 다양한 측면을 고려하는 것이 필요하다(Dawson-Hughes 2004). | |
비타민 D의 생화학적 영양상태를 적정수준으로 유지하기 위한 개선 방향 제시에 제약이 따르는 이유는? | 4%가 부족한 상태로 평가되었다(Choi 2012). 그러나 국민건강영양조사에서는 혈청 25-(OH) 비타민 D는 측정하였지만 비타민 D 섭취량과 자외선 노출시간이나 옥외활동량 등에 관한 구체적인 정보가 수집되지 않았기 때문에 비타민 D의 생화학적 영양상태를 적정수준으로 유지하는데 필요한 식사섭취량이나 옥외활동량 등에 대한 개선방향을 제시하기에는 제약이 따르고 있다. | |
자외선을 통한 비타민 D의 피부 합성에 어떤 것이 영향을 주는가? | 생활양식의 변화와 더불어 실내에서 생활하는 시간이 많아지면서 현대인들은 비타민 D의 피부 합성기회가 점차로 감소되어 비타민 D 부족이 우려되고 있다(Holick 1994; Thuesen 등 2012; Cinar 등 2014; Darling 등 2014). 비타민 D의 체내 합성에 영향을 주는 자외선은 그 지역의 위도, 하루 중의 시간, 계절(Webb 등 1988) 등에 따라 달라지며 자외선 차단제(Matsuoka 등 1990), 의복의 착용(Matsuoka 등 1992), 건물의 유리(Holick 1994), 공해(Kim & Park 1987)등의 영향을 받는다고 한다. 따라서 비타민 D의 영양상태를 평가하려면 식사섭취량과 자외선 노출 시간을 함께 고려하는 것이 필요한데, 혈액으로 유입되는 이 두 가지 급원의 비타민 D는 모두 간에서 25-OH-비타민 D로 전환되므로 혈액의 25-OH-비타민 D는 인체의 비타민 D 영양상태 변화를 민감하게 반영하는 것으로 알려져 있다(Holick 1994). |
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