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J Am Coll Nutr. 2017 Jul;36(5):386-390. doi: 10.1080/07315724.2017.1299651. Epub 2017 Jun 19.

Calcium Bioavailability from Mineral Waters with Different Mineralization in Comparison to Milk and a Supplement.

Author information

1
a Institute of Food Science and Human Nutrition, Leibniz University Hannover , Hannover , Germany.

Abstract

OBJECTIVE:

The aim of the present study was to compare the bioavailability of calcium from 3 mineral waters with different concentrations of minerals with that of milk and a calcium supplement.

METHODS:

A single-center, randomized controlled trial with a crossover design with 21 healthy men and women was conducted at the Institute of Food Science and Human Nutrition, Leibniz University Hannover. The participants consumed the 5 test products providing 300 mg of calcium each on 5 examination days with 1-week wash-out phases in between. Primary outcome variables were the area under the curve of serum calcium levels for 10-hour (AUC0-10h) and 24-hour urinary calcium excretion.

RESULTS:

In all groups, no significant differences in the AUC0-10h of serum calcium levels as well as in the 24-hour urinary calcium excretion were observed. Likewise, mean changes in serum phosphate and urinary phosphate, as well as serum parathormone, showed no differences between the groups.

CONCLUSION:

Given an equivalent bioavailability of calcium in all test products, neither a high concentration of SO42- or of HCO3 influenced the bioavailability of calcium. Accordingly, the use of mineral water with high concentrations of calcium constitutes a calorie-free calcium source that can improve calcium supply.

KEYWORDS:

Mineral water; bioavailability; calcium; general nutrition; mineralization

PMID:
28628402
DOI:
10.1080/07315724.2017.1299651
[Indexed for MEDLINE]

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