Adaptive responses in men fed low- and high-copper diets

Harvey, Linda J, Majsak-Newman, Gosia, Dainty, Jack R, Lewis, D John, Langford, Nicola J, Crews, Helen M and Fairweather-Tait, Susan J (2003) Adaptive responses in men fed low- and high-copper diets. British Journal of Nutrition, 90 (1). pp. 161-168. ISSN 0007-1145

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Abstract

The study of Cu metabolism is hampered by a lack of sensitive and specific biomarkers of status and suitable isotopic labels, but limited information suggests that Cu homeostasis is maintained through changes in absorption and endogenous loss. The aim of the present study was to employ stable-isotope techniques to measure Cu absorption and endogenous losses in adult men adapted to low, moderate and high Cu-supplemented diets. Twelve healthy men, aged 20-59 years, were given diets containing 0.7, 1.6 and 6.0 mg Cu/d for 8 weeks, with at least 4 weeks intervening washout periods. After 6 weeks adaptation, apparent and true absorption of Cu were determined by measuring luminal loss and endogenous excretion of Cu following oral administration of 3 mg highly enriched (65)Cu stable-isotope label. Apparent and true absorption (41 and 48 % respectively) on the low-Cu diet were not significantly different from the high-Cu diet (45 and 48 % respectively). Endogenous losses were significantly reduced on the low- (0.45 mg/d; P

Item Type: Article
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
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University of East Anglia > Faculty of Medicine and Health Sciences > Research Groups > Nutrition
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Depositing User: Pure Connector
Date Deposited: 05 Aug 2014 13:18
Last Modified: 25 Jul 2018 09:48
URI: https://ueaeprints.uea.ac.uk/id/eprint/49186
DOI: 10.1079/BJN2003887

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