Copper, iron and zinc absorption, retention and status of young women fed vitamin B-6 deficient diets

Conference · Mon Mar 11 04:00:00 EST 1991 · FASEB Journal (Federation of American Societies for Experimental Biology); (United States)

OSTI ID:5265355

Turnlund, J R; Keyes, W R; Hudson, C A; Betschart, A A; Kretsch, M J; Sauberlich, H E ^[1]

---

1. USDA/ARS, San Francisco, CA (United States) Western Regional Research Center, Albany, CA (United States)

A study was conducted in young women to determine the effect of vitamin B-6 deficient diets on copper, iron and zinc metabolism. Young women were confined to a metabolic research unit for 84 and 98 days. They were fed a vitamin B-6 deficient formula diet initially, followed by food diet containing four increasing levels of vitamin B-6. Copper, iron and zinc absorption, retention and status were determined at intervals throughout the study. Absorption was determined using the stable isotopes {sup 65}Cu, {sup 54}Fe, and {sup 67}Zn. Status was based on serum copper and zinc, hemoglobin, hematocrit and mean corpuscular volume. Copper absorption averaged 18 {plus minus} 1% during vitamin B-6 depletion, significantly lower than 24 {plus minus} 1% during repletion, but serum copper was not affected and balance was positive. Iron absorption was not impaired significantly by vitamin B-6 deficient diets, but status declined during the depletion period. Zinc absorption averaged 40 {plus minus} 2% during depletion and 27 {plus minus} 2% during repletion. Zinc absorption and retention were significantly greater during vitamin B-6 depletion, but serum zinc declined suggesting the absorbed zinc was not available for utilization. The results suggest that vitamin B-6 depletion of young women may inhibit copper absorption, affect iron status and alter zinc metabolism. The effects of vitamin B-6 depletion differ markedly among these elements.

• OSTI ID: 5265355
• Report Number(s): CONF-9104107--
• Conference Information: Journal Name: FASEB Journal (Federation of American Societies for Experimental Biology); (United States) Journal Volume: 5:4
• Country of Publication: United States
• Language: English

Related Subjects

560300* -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ABSORPTION
ANIMALS
BIOLOGICAL EFFECTS
BLOOD COUNT
CARBOXYLIC ACIDS
COPPER
COPPER 65
COPPER ISOTOPES
DIET
ELEMENTS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FEMALES
GLOBINS
HEMOGLOBIN
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INHIBITION
INTERMEDIATE MASS NUCLEI
IRON
IRON 54
IRON ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MAMMALS
MAN
METABOLISM
METALS
NUCLEI
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PIGMENTS
PORPHYRINS
PRIMATES
PROTEINS
RETENTION
STABLE ISOTOPES
TRACER TECHNIQUES
TRANSITION ELEMENTS
VERTEBRATES
VITAMIN B GROUP
VITAMINS
WOMEN
ZINC
ZINC 67
ZINC ISOTOPES