中山醫學大學機構典藏 CSMUIR:Item 310902500/3585
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    题名: Vitamin B-6 requirement and status assessment of young women fed a high-protein diet with various levels of vitamin B-6
    作者: Yi-Chia Huang;Wei Chen;Marc A Evans;Madeleine E Mitchell;Terry D Shultz
    贡献者: 中山醫學大學:營養系
    关键词: Vitamin B-6;requirement;assessment;pyridoxic;acid;pyridoxal;P;pyridoxal;aminotransferases;urine;plasma;erythrocyte;women;recommended dietary allowance
    日期: 1998
    上传时间: 2011-03-14T03:51:08Z (UTC)
    摘要: The vitamin B-6 requirement of young women consuming a constant high-protein diet (1.55 g/kg body wt) and the effect of various ratios of vitamin B-6 to protein on this requirement were studied. Eight women were fed a lactoovovegetarian basal diet containing 0.45 mg vitamin B-6 (2.66 mmol as pyridoxine) and 30 mmol carnitine for 92 d. The protocol consisted of successive baseline adjustment (9 d), depletion (27 d), and repletion (two 21-d and then one 14-d) periods. Vitamin B-6 intakes were 1.60, 0.45, 1.26, 1.66, and 2.06 mg, resulting in ratios of vitamin B-6 (in mg) to protein (in g) for the five periods of 0.016, 0.005, 0.013, 0.017, and 0.021, respectively. Direct and indirect as well as short- and long-term vitamin B-6 status measures were assessed weekly. Regression analysis revealed that the amount of dietary vitamin B-6 required to normalize urinary 4-pyridoxic acid, plasma pyridoxal-P, erythrocyte pyridoxal-P and pyridoxal, and erythrocyte alanine and aspartate aminotransferase activity coefficients to predepletion baseline values was 1.94 mg vitamin B-6/d (0.019 mg vitamin B-6/g protein). This study suggests that the current vitamin B-6 recommended dietary allowance of 1.6 mg/d based on 0.016 mg/g protein is not an adequate intake and may require reevaluation.
    URI: https://ir.csmu.edu.tw:8080/handle/310902500/3585
    關聯: Am J Clin Nutr, 1998;67:208–20.
    显示于类别:[營養學系暨碩士班] 期刊論文

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