title: Dietary intake of total and glycosylated vitamin B-6 and the vitamin B-6 nutritional status of unsupplemented lactating women and their infants.
abstract: The mean dietary intakes of total and glycosylated vitamin B-6, determined from analysis of 3-d diet composites collected from 30 lactating women, were 8.63 +/- 4.04 and 1.33 +/- 0.85 mumol/d (mean +/- SD), respectively. A comparison of linear regression models that either included or excluded dietary glycosylated vitamin B-6 content indicates that the intake of glycosylated vitamin B-6 had little, if any, effect upon maternal plasma pyridoxal 5'-phosphate concentration and maternal urinary excretion of total vitamin B-6 and 4-pyridoxic acid. On the basis of guidelines from the literature for evaluating biochemical indices of vitamin B-6 nutriture, the women appeared to be consuming adequate amounts of the vitamin. The mean breast-milk concentrations of total and glycosylated vitamin B-6 were 733 and 18 nmol/L, respectively. Infant plasma pyridoxal 5'-phosphate concentration was 54 +/- 44 nmol/L (mean +/- SD) and all infants had lengths and weights appropriate for age.
authors.affiliation: Nutritional Sciences Program, University of Maryland, College Park.
authors.forename: M B
authors.initials: MB
authors.lastname: Andon
authors.forename: R D
authors.initials: RD
authors.lastname: Reynolds
authors.forename: P B
authors.initials: PB
authors.lastname: Moser-Veillon
authors.forename: M P
authors.initials: MP
authors.lastname: Howard
mesh_terms: D000328:Adult; D001942:Breast Feeding; D004032:Diet; D005260:Female; D005960:Glucosides; D006801:Humans; D007223:Infant; D007774:Lactation / Q000378:metabolism*; D008895:Milk, Human / Q000378:metabolism; D009751:Nutritional Requirements; D009752:Nutritional Status; D011247:Pregnancy; D011732:Pyridoxal Phosphate / Q000378:metabolism; D011735:Pyridoxic Acid / Q000378:metabolism; D011736:Pyridoxine / Q000008:administration & dosage* / Q000031:analogs & derivatives* / Q000378:metabolism
chemical_list: D005960:Glucosides; C022945:5'-O-(glucopyranosyl)pyridoxine; D011735:Pyridoxic Acid; D011732:Pyridoxal Phosphate; D011736:Pyridoxine