Increased calcium absorption from synthetic stable amorphous calcium carbonate: Double-blind randomized crossover clinical trial in postmenopausal women

Nachum Vaisman, Galit Shaltiel, Michal Daniely, Oren E. Meiron, Assaf Shechter, Steven A. Abrams, Eva Niv, Yami Shapira, Amir Sagi

Research output: Contribution to journalArticlepeer-review

Abstract

Calcium supplementation is a widely recognized strategy for achieving adequate calcium intake. We designed this blinded, randomized, crossover interventional trial to compare the bioavailability of a new stable synthetic amorphous calcium carbonate (ACC) with that of crystalline calcium carbonate (CCC) using the dual stable isotope technique. The study was conducted in the Unit of Clinical Nutrition, Tel Aviv Sourasky Medical Center, Israel. The study population included 15 early postmenopausal women aged 54.9±2.8 (mean±SD) years with no history of major medical illness or metabolic bone disorder, excess calcium intake, or vitamin D deficiency. Standardized breakfast was followed by randomly provided CCC or ACC capsules containing 192mg elemental calcium labeled with 44Ca at intervals of at least 3 weeks. After swallowing the capsules, intravenous CaCl2labeled with 42Ca on was administered on each occasion. Fractional calcium absorption (FCA) of ACC and CCC was calculated from the 24-hour urine collection following calcium administration. The results indicated that FCA of ACC was doubled (±0.96 SD) on average compared to that of CCC (p < 0.02). The higher absorption of the synthetic stable ACC may serve as a more efficacious way of calcium supplementation.

Original languageEnglish
Pages (from-to)2203-2209
Number of pages7
JournalJournal of Bone and Mineral Research
Volume29
Issue number10
DOIs
StatePublished - 1 Oct 2014
Externally publishedYes

Keywords

  • Absorption
  • Amorphous calcium carbonate
  • Calcium bioavailability
  • Postmenopause
  • Stable isotopes

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