title: Plasma B6 vitamer and plasma and urinary 4-pyridoxic acid concentrations of middle-aged obese black women.
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.
authors.affiliation: Department of Human Nutrition and Foods, Virginia Polytechnic Institute and State University, Blacksburg 24061.
authors.forename: J A
authors.initials: JA
authors.lastname: Driskell
authors.forename: B M
authors.initials: BM
authors.lastname: Chrisley
authors.forename: L K
authors.initials: LK
authors.lastname: Reynolds
authors.forename: S W
authors.initials: SW
authors.lastname: Moak
mesh_terms: D000328:Adult; D001741:Black or African American; D001827:Body Height; D001835:Body Weight; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D008875:Middle Aged; D009752:Nutritional Status; D009765:Obesity / Q000097:blood* / Q000652:urine*; D011735:Pyridoxic Acid / Q000097:blood* / Q000652:urine*; D011736:Pyridoxine / Q000097:blood* / Q000652:urine*; D013050:Spectrometry, Fluorescence
chemical_list: D011735:Pyridoxic Acid; D011736:Pyridoxine