Alkaline mineral water lowers bone resorption even in calcium sufficiency: alkaline mineral water and bone metabolism

Wynn E, Krieg MA, Aeschlimann JM, Burckhardt P.
Centre of Bone Diseases, Lausanne University Hospital, Lausanne, Switzerland. emma.wynn@chuv.ch

Abstract

BACKGROUND:

Dietary acid charge enhances bone loss. Bicarbonate or alkali diet decreases bone resorption in humans. We compared the effect of an alkaline mineral water, rich in bicarbonate, with that of an acid one, rich in calcium only, on bone markers, in young women with a normal calcium intake.

METHODS:

This study compared water A (per litre: 520 mg Ca, 291 mg HCO(3)(-), 1160 mg SO(4)(-), Potential Renal Acid load (PRAL) +9.2 mEq) with water B (per litre: 547 mg Ca, 2172 mg HCO(3)(-), 9 mg SO(4)(-), PRAL -11.2 mEq). 30 female dieticians aged 26.3 yrs (SD 7.3) were randomized into two groups, followed an identical weighed, balanced diet (965 mg Ca) and drank 1.5 l/d of the assigned water. Changes in blood and urine electrolytes, C-telopeptides (CTX), urinary pH and bicarbonate, and serum PTH were measured after 2 and 4 weeks.

RESULTS:

The two groups were not different at baseline, and showed a similar increase in urinary calcium excretion. Urinary pH and bicarbonate excretion increased with water B, but not with water A. PTH (p=0.022) and S-CTX (p=0.023) decreased with water B but not with water A.

CONCLUSION:

In calcium sufficiency, the acid calcium-rich water had no effect on bone resorption, while the alkaline water rich in bicarbonate led to a significant decrease of PTH and of S-CTX.

PMID: 18926940 [PubMed - indexed for MEDLINE]

Wynn E, Krieg, M.A, Aeschlimann, J.M, Burckhardt, P, Alkaline mineral water lowers bone resorption even in calcium sufficiency. Bone; January 2009 44 (1): 120-124 http://www.ncbi.nlm.nih.gov/pubmed/18926940

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