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

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Objective: Calcium absorption was determined from calcium-fortified diluted orange juice, which contained additional citrate or malate, in 16 normal subjects. Methods: 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 47Ca chloride on a separate occasion. Results: 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). Conclusion: 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
StatePublished - 1994

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orange juice
malates
Citric Acid
citrates
Calcium
calcium
Forearm
Radioactivity
Intestinal Absorption
Intravenous Administration
Oral Administration
Chlorides
calcium orange
malic acid
intravenous injection
oral administration
juices
chlorides

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Food Science

Cite this

Effect of added citrate or malate on calcium absorption calcium-fortified orange juice. / Pak, C. Y C; Stewart, A.; Haynes, S. D S.

In: Journal of the American College of Nutrition, Vol. 13, No. 6, 1994, p. 575-577.

Research output: Contribution to journalArticle

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AU - Pak, C. Y C

AU - Stewart, A.

AU - Haynes, S. D S

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N2 - Objective: Calcium absorption was determined from calcium-fortified diluted orange juice, which contained additional citrate or malate, in 16 normal subjects. Methods: 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 47Ca chloride on a separate occasion. Results: 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). Conclusion: Calcium-fortified orange juice with additional citrate provides equivalent bioavailable calcium as the juice with additional malate.

AB - Objective: Calcium absorption was determined from calcium-fortified diluted orange juice, which contained additional citrate or malate, in 16 normal subjects. Methods: 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 47Ca chloride on a separate occasion. Results: 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). Conclusion: Calcium-fortified orange juice with additional citrate provides equivalent bioavailable calcium as the juice with additional malate.

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