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  • Title: Plasma B6 vitamer and plasma and urinary 4-pyridoxic acid concentrations of middle-aged obese black women.
    Author: Driskell JA, Chrisley BM, Reynolds LK, Moak SW.
    Journal: J Chromatogr; 1991 Aug 23; 568(2):333-40. PubMed ID: 1783639.
    Abstract:
    Plasma B6 vitamer and plasma and urinary 4-pyridoxic acid (4-PA) concentrations of fifteen middle-aged obese black women were determined by high-performance liquid chromatography (HPLC). Estimated protein and vitamin B6 intakes of the subjects, aged 27-52 years, were 64.5 +/- 15.6 g and 1.21 +/- 0.68 mg (mean +/- S.D.), respectively. Mean HPLC-derived plasma B6 vitamer and 4-PA concentrations for these subjects were 68.9, 3.1, 1.2, 4.1, 3.4, 7.2 and 2.0 nmol/l for pyridoxal 5'-phosphate (PLP), pyridoxine 5'-phosphate, pyridoxamine 5'-phosphate, pyridoxal, pyridoxine, pyridoxamine and 4-PA, respectively. The mean urinary 4-PA/creatinine ratio of the women was 0.88 mumol/mmol. All subjects had plasma PLP levels indicative of adequate vitamin B6 status. Vitamin B6 status parameters of the middle-aged obese black women were similar to those previously reported for white nonobese women having adequate vitamin B6 status.
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