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Calcium absorption from calcium carbonate and a new form of calcium (CCM) in healthy male and female adolescents.

Authors
  • Miller, J Z
  • Smith, D L
  • Flora, L
  • Slemenda, C
  • Jiang, X Y
  • Johnston, C C Jr
Type
Published Article
Journal
The American journal of clinical nutrition
Publication Date
Nov 01, 1988
Volume
48
Issue
5
Pages
1291–1294
Identifiers
PMID: 3189218
Source
Medline
License
Unknown

Abstract

Calcium absorption from two Ca salts was investigated in a crossover design using stable isotopic tracers in 12 healthy adolescents (6 males, 6 females). A Ca supplement in the form of Ca carbonate or Ca citric and malic acids (CCM) was ingested with a standardized breakfast and the order of administration was randomized. The oral supplement contained 250 mg elemental Ca, 21.8 mg of which was highly enriched 44Ca tracer. Thirty minutes later subjects received 3.6 mg 42Ca tracer intravenously. The molar concentrations of 42Ca and 44Ca tracers in a urine sample obtained 24 h after tracer administration were quantified by fast-atom-bombardment mass spectrometry and used to determine fractional absorption of the Ca from the supplement. Ca in the form of CCM had an increased fractional absorption (p less than 0.03) relative to Ca carbonate in healthy adolescents (36.2 vs 26.4%). This increase was not related to body size, sex, or indices of Ca metabolism.

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