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NTIS 바로가기韓國營養學會誌 = The Korean journal of nutrition., v.43 no.3, 2010년, pp.315 - 323
The purpose of this study was to establish the selection of indicators for estimating and factors affecting the requirement of vitamin B6. There has been a need to establish the human requirements of vitamin
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핵심어 | 질문 | 논문에서 추출한 답변 |
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Trytophan 부하검사가 현재는 비타민B6 영양상태 판정방법으로 많이 쓰이지 않고 있는 이유는? | Trytophan 대사물은 ion-exchange chromatography 또는 fluometric 법으로 측정한다.22) 그러나 이 검사법은 비타민 B6 섭취량이 매우 낮은 (0.8 mg/일 이하) 경우에는 비타민 B6 영양상태 지표로 사용될 수 있으나 보통 성인의 섭취범위인 1.0 mg에서 2.5 mg에서는 유용하게 사용할 수 없다. 더욱이 tryptophan대사가 비타민 B6 영양상태 이외의 다른 요인들에 의해서 영향을 받는 것으로 보고되어23) 현재는 비타민 B6 영양상태 판정방법으로 많이 쓰이지 않고 있다. | |
비타민 B6는 식품 중에 어떤 형태로 존재하는가? | 1934년 비타민 B6가 발견된 이래 인체 건강에 미치는 비타민 B6의 효과에 대해서 많은 연구가 있었으며, 우리나라에서도 1995년 한국인 영양권장량 제 6차 개정부터 비타민 B6의 권장량이 설정되었다. 비타민 B6는 식품 중에 피리독신 (pyridoxine, PN), 피리독살 (pyridoxal, PL), 피리독사민 (pyridoaxamine, PM) 또는 각각의 인산화형태 (PLP, PNP, PMP)로 존재한다. 여러 가지 유도체로 흡수된 비타민 B6의 대부분은 간으로 운반되어 pyridoxal 5’-phosphate (PLP)로 전환되며 4-pyridoxic acid (4-PA)로 이화되어 배설된다. | |
현재 비타민 B6 영양상태를 평가하는 지표로서 가장 적절하다고 인정되는 것은 무엇인가? | 또한 적절한 비타민 B6의 영양상태 판정 지표의 선택 못지않게 중요한 것은 각 지표에 대한 분석법의 정확성 및 재현성 확보이다. 현재 비타민 B6 영양상태를 평가하는 지표로서 가장 적절하다고 인정되는 혈장 PLP의 경우, 효소법과 HPLC 법이 사용되는데, 최근의 연구1)에서 단일 혈장을 비타민 B6분석에 숙련된 25개 기관이 참가한 연구에서도 회수율은 분석방법별로 75~119%로 비교적 양호하였으나, 시험일내 변이계수 (3표본 × 3반복/일)는 0.6~37%, 시험일간 변이계수 (20표본 × 3반복/일)는 1. |
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