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비타민 B6 필요량: 영양상태 판정지표 및 영향요인
Vitamin B6 Requirement: Indicators and Factors Affecting 원문보기

韓國營養學會誌 = The Korean journal of nutrition., v.43 no.3, 2010년, pp.315 - 323  

조윤옥 (덕성여자대학교 식품영양학과)

Abstract AI-Helper 아이콘AI-Helper

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 $B_6$ since vitamin $B_6$ is thought to be involved in more than one h...

주제어

AI 본문요약
AI-Helper 아이콘 AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

문제 정의

  • 그러므로 본 연구는 1960년대 이후 최근까지 발표된 논문을 고찰하여 비타민 B6 필요량을 결정하기 위한 적절한 영양상태 판정 방법의 선택과 비타민 B6 필요량에 영향을 미치는 요인들에 대한 의견을 제시하고자 하였다.

가설 설정

  • 25) 사람을 대상으로 한 식이섭취 연구에서 비타민 B6의 체내이용률은 혼합식의 경우 75% 정도이었으며, 식이 내 피리독신 배당체 (PNG)의 체내이용률은 다른 비타민 B6의 약 50%정도이며 혼합식의 경우 약 15%의 배당체를 함유한다.26,27) 식품과 함께 섭취하지 않은 B6 유도체들의 흡수는 상대적이다. 50 mg의 PL이나 PLP를 투여했을 때 70%정도가 24시간 내에 소변으로 배출된 반면 피리독신은 40% 정도 소변으로 배출되어 피리독살보다 피리독신이 효율적으로 체내에 보유된 것으로 보고되었다.
본문요약 정보가 도움이 되었나요?

질의응답

핵심어 질문 논문에서 추출한 답변
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.
질의응답 정보가 도움이 되었나요?

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