Calcium Requirements and Metabolism in Chinese-American Boys and Girls

Calcium requirements of North American adolescents were set at 1300 mg/day based on data from white girls. Calcium requirements for Asian-American adolescents have not been studied. Using metabolic balance protocols and a range in calcium intakes, skeletal calcium retention was determined in Chinese...

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Main Authors:	Wu, Lu, Martin, Berdine R, Braun, Michelle M, Wastney, Meryl E, McCabe, George P, McCabe, Linda D, DiMeglio, Linda A, Peacock, Munro, Weaver, Connie M
Format:	Online
Language:	English
Published:	Wiley Subscription Services, Inc., A Wiley Company 2010
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3153353/

id	pubmed-3153353
recordtype	oai_dc
spelling	pubmed-31533532011-08-19 Calcium Requirements and Metabolism in Chinese-American Boys and Girls Wu, Lu Martin, Berdine R Braun, Michelle M Wastney, Meryl E McCabe, George P McCabe, Linda D DiMeglio, Linda A Peacock, Munro Weaver, Connie M Original Article Calcium requirements of North American adolescents were set at 1300 mg/day based on data from white girls. Calcium requirements for Asian-American adolescents have not been studied. Using metabolic balance protocols and a range in calcium intakes, skeletal calcium retention was determined in Chinese-American adolescents. A sample of 29 adolescents, 15 boys aged 12 to 15 years and 14 girls aged 11 to 15 years, was studied twice on paired calcium intakes ranging between 629 to 1835 mg/day using a randomized-order crossover design. Calcium absorption and bone turnover rates using double-stable calcium isotope kinetic analysis on two calcium intakes per subject were measured and compared in boys and girls. Girls and boys had low habitual mean calcium intakes of 648 and 666 mg/day, respectively, and low mean serum 25-hydroxyvitamin D concentrations of 19.1 and 22.2 ng/mL, respectively. True fractional calcium absorption varied inversely with calcium load. Boys had significantly higher bone turnover rate than girls at the same calcium intake. Calcium retention increased with calcium intake; calcium intakes to achieve maximal calcium retention were 1100 mg/day in boys and 970 mg/day in girls. Recommendations for calcium requirements should be lowered for Chinese-American adolescents. © 2010 American Society for Bone and Mineral Research. Wiley Subscription Services, Inc., A Wiley Company 2010-08 2010-03-04 /pmc/articles/PMC3153353/ /pubmed/20205166 http://dx.doi.org/10.1002/jbmr.76 Text en Copyright © 2010 American Society for Bone and Mineral Research http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Wu, Lu Martin, Berdine R Braun, Michelle M Wastney, Meryl E McCabe, George P McCabe, Linda D DiMeglio, Linda A Peacock, Munro Weaver, Connie M
spellingShingle	Wu, Lu Martin, Berdine R Braun, Michelle M Wastney, Meryl E McCabe, George P McCabe, Linda D DiMeglio, Linda A Peacock, Munro Weaver, Connie M Calcium Requirements and Metabolism in Chinese-American Boys and Girls
author_facet	Wu, Lu Martin, Berdine R Braun, Michelle M Wastney, Meryl E McCabe, George P McCabe, Linda D DiMeglio, Linda A Peacock, Munro Weaver, Connie M
author_sort	Wu, Lu
title	Calcium Requirements and Metabolism in Chinese-American Boys and Girls
title_short	Calcium Requirements and Metabolism in Chinese-American Boys and Girls
title_full	Calcium Requirements and Metabolism in Chinese-American Boys and Girls
title_fullStr	Calcium Requirements and Metabolism in Chinese-American Boys and Girls
title_full_unstemmed	Calcium Requirements and Metabolism in Chinese-American Boys and Girls
title_sort	calcium requirements and metabolism in chinese-american boys and girls
description	Calcium requirements of North American adolescents were set at 1300 mg/day based on data from white girls. Calcium requirements for Asian-American adolescents have not been studied. Using metabolic balance protocols and a range in calcium intakes, skeletal calcium retention was determined in Chinese-American adolescents. A sample of 29 adolescents, 15 boys aged 12 to 15 years and 14 girls aged 11 to 15 years, was studied twice on paired calcium intakes ranging between 629 to 1835 mg/day using a randomized-order crossover design. Calcium absorption and bone turnover rates using double-stable calcium isotope kinetic analysis on two calcium intakes per subject were measured and compared in boys and girls. Girls and boys had low habitual mean calcium intakes of 648 and 666 mg/day, respectively, and low mean serum 25-hydroxyvitamin D concentrations of 19.1 and 22.2 ng/mL, respectively. True fractional calcium absorption varied inversely with calcium load. Boys had significantly higher bone turnover rate than girls at the same calcium intake. Calcium retention increased with calcium intake; calcium intakes to achieve maximal calcium retention were 1100 mg/day in boys and 970 mg/day in girls. Recommendations for calcium requirements should be lowered for Chinese-American adolescents. © 2010 American Society for Bone and Mineral Research.
publisher	Wiley Subscription Services, Inc., A Wiley Company
publishDate	2010
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3153353/
_version_	1611470123526258688

Calcium Requirements and Metabolism in Chinese-American Boys and Girls

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