Racial differences in calcium retention in response to dietary salt in adolescent girls

Karin Wigertz, Cristina Palacios, Lisa A. Jackman, Berdine R. Martin, Linda Doyle McCabe, George P. McCabe, Munro Peacock, J. Howard Pratt, Connie M. Weaver

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Background: Sodium is an important determinant of urinary calcium excretion, and race is an important determinant of calcium retention. The effect of dietary sodium on calcium retention and the influence of race have not been studied in adolescence, the life stage during which peak bone mass is accrued. Objective: The study reported here was undertaken to compare racial differences in calcium retention as a function of dietary salt intake. Design: A total of 35 adolescent girls (22 black and 13 white) participated in two 20-d metabolic summer camps, separated by 2 wk, that simulated a free-living environment. The effect of changes in dietary sodium on calcium retention was tested in a randomizedorder, crossover design with 2 concentrations of sodium-1.30 g/d (57 mmol/d) and 3.86 g/d (168 mmol/d)-and a constant calcium intake of 815 mg/d (20 mmol/d). Results: Both race and sodium intake significantly affected calcium retention (P < 0.01). Calcium retention was significantly greater in black girls than in white girls, regardless of dietary sodium intake (P < 0.001). The high-sodium diet significantly reduced calcium retention in both whites and blacks (P < 0.01), primarily through a decrease in net calcium absorption. Black girls excreted significantly less calcium in the urine than did white girls, regardless of diet (P < 0.05). Conclusions: Calcium retention is significantly greater in black girls than in white girls but is significantly reduced in girls of both races in response to salt loading.

Original languageEnglish
Pages (from-to)845-850
Number of pages6
JournalAmerican Journal of Clinical Nutrition
Volume81
Issue number4
StatePublished - 2005

Fingerprint

Salts
Calcium
calcium
sodium
Dietary Sodium
Sodium
table salt
high sodium diet
Diet
Cross-Over Studies
urine
excretion
bones
Urine
salts
Bone and Bones
summer
diet

Keywords

  • Bone turnover
  • Calcium retention
  • Dietary sodium
  • Female adolescents
  • Metabolic study
  • Race
  • Urinary calcium

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Food Science

Cite this

Wigertz, K., Palacios, C., Jackman, L. A., Martin, B. R., McCabe, L. D., McCabe, G. P., ... Weaver, C. M. (2005). Racial differences in calcium retention in response to dietary salt in adolescent girls. American Journal of Clinical Nutrition, 81(4), 845-850.

Racial differences in calcium retention in response to dietary salt in adolescent girls. / Wigertz, Karin; Palacios, Cristina; Jackman, Lisa A.; Martin, Berdine R.; McCabe, Linda Doyle; McCabe, George P.; Peacock, Munro; Pratt, J. Howard; Weaver, Connie M.

In: American Journal of Clinical Nutrition, Vol. 81, No. 4, 2005, p. 845-850.

Research output: Contribution to journalArticle

Wigertz, K, Palacios, C, Jackman, LA, Martin, BR, McCabe, LD, McCabe, GP, Peacock, M, Pratt, JH & Weaver, CM 2005, 'Racial differences in calcium retention in response to dietary salt in adolescent girls', American Journal of Clinical Nutrition, vol. 81, no. 4, pp. 845-850.
Wigertz K, Palacios C, Jackman LA, Martin BR, McCabe LD, McCabe GP et al. Racial differences in calcium retention in response to dietary salt in adolescent girls. American Journal of Clinical Nutrition. 2005;81(4):845-850.
Wigertz, Karin ; Palacios, Cristina ; Jackman, Lisa A. ; Martin, Berdine R. ; McCabe, Linda Doyle ; McCabe, George P. ; Peacock, Munro ; Pratt, J. Howard ; Weaver, Connie M. / Racial differences in calcium retention in response to dietary salt in adolescent girls. In: American Journal of Clinical Nutrition. 2005 ; Vol. 81, No. 4. pp. 845-850.
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