Effect of calcium phosphate and vitamin D3 supplementation on bone remodelling and metabolism of calcium, phosphorus, magnesium and iron

Nutrition Journal

Gerhard Jahreis¹  Jürgen Kratzsch²  Michael Kiehntopf⁴  Matthias Leiterer³  Nadja Neef¹  Ulrike Trautvetter¹ 

[1] Department of Nutritional Physiology, Institute of Nutrition, Friedrich Schiller University of Jena, Dornburger Str, 24, D-07743, Jena, Germany;Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostic, University Leipzig, Liebigstr. 27, D-04103, Leipzig, Germany;Thuringian State Institute of Agriculture, Naumburger Str. 98, D-07743, Jena, Germany;Institute of Clinical Chemistry and Laboratory Medicine, Friedrich Schiller University Jena, Erlanger Allee 101, D-07747, Jena, Germany

关键词: Bone remodelling;    Human study;    Iron;    Magnesium;    Phosphorus;    Calcium;    Vitamin D;   

Others  :  801890
DOI  :  10.1186/1475-2891-13-6

 received in 2013-07-16, accepted in 2014-01-08,  发布年份 2014

【 摘 要 】

Background

The aim of the present study was to determine the effect of calcium phosphate and/or vitamin D₃ on bone and mineral metabolism.

Methods

Sixty omnivorous healthy subjects participated in the double-blind, placebo-controlled parallel designed study. Supplements were tricalcium phosphate (CaP) and cholecalciferol (vitamin D₃). At the beginning of the study (baseline), all subjects documented their normal nutritional habits in a dietary record for three successive days. After baseline, subjects were allocated to three intervention groups: CaP (additional 1 g calcium/d), vitamin D₃ (additional 10 μg/d) and CaP + vitamin D₃. In the first two weeks, all groups consumed placebo bread, and afterwards, for eight weeks, the test bread according to the intervention group. In the last week of each study period (baseline, placebo, after four and eight weeks of intervention), a faecal (three days) and a urine (24 h) collection and a fasting blood sampling took place. Calcium, phosphorus, magnesium and iron were determined in faeces, urine and blood. Bone formation and resorption markers were analysed in blood and urine.

Results

After four and eight weeks, CaP and CaP + vitamin D₃ supplementations increased faecal excretion of calcium and phosphorus significantly compared to placebo. Due to the vitamin D₃ supplementations (vitamin D₃, CaP + vitamin D₃), the plasma 25-(OH)D concentration significantly increased after eight weeks compared to placebo. The additional application of CaP led to a significant increase of the 25-(OH)D concentration already after four weeks. Bone resorption and bone formation markers were not influenced by any intervention.

Conclusions

Supplementation with daily 10 μg vitamin D₃ significantly increases plasma 25-(OH)D concentration. The combination with daily 1 g calcium (as CaP) has a further increasing effect on the 25-(OH)D concentration. Both CaP alone and in combination with vitamin D₃ have no beneficial effect on bone remodelling markers and on the metabolism of calcium, phosphorus, magnesium and iron.

Trial registration

NCT01297023

【 授权许可】

   
2014 Trautvetter et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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