Effect of added citrate or malate on calcium absorption from calcium-fortified orange juice

C. Y C Pak, A. Stewart, S. D S Haynes

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Calcium absorption was determined from calcium-fortified diluted orange juice, which contained additional citrate or malate, in 16 normal subjects. Each load of fortified orange juice with additional citrate (OJ+C) contained 300 mg Ca, 5.7 mEq malate, and 33.6 mEq citrate (10.4 mEq of which were added). Each load of orange juice with additional malate (OJ+M) had 300 mg Ca, 23.2 mEq citrate and 16.1 mEq malate (10.4 mEq of which were added). For each subject, fractional (intestinal) calcium absorption was measured by taking the ratio of fractional forearm radioactivity following an oral administration of OJ+C or OJ+M (labeled with 47Ca) and the fractional forearm radioactivity obtained after intravenous administration of trace 4TCa chloride on a separate occasion. There was no significant difference in fractional calcium absorption from the two calcium- fortified orange juice preparations (40.1 ± 8.3% for OJ+C and 40.6 ± 8.6% for OJ+M, p = 0.81). Calcium-fortified orange juice with additional citrate provides equivalent bioavailable calcium as the juice with additional malate.

Original languageEnglish (US)
Pages (from-to)575-577
Number of pages3
JournalJournal of the American College of Nutrition
Volume13
Issue number6
DOIs
StatePublished - Dec 1 1994

Keywords

  • Calcium absorption
  • Calcium citrate
  • Calcium citrate-malate

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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