Effect of water composition and timing of ingestion on urinary lithogenic profile in healthy volunteers: a randomized crossover trial.

Journal of Nephrology
Pietro Manuel FerraroGiovanni Gambaro

Abstract

Kidney stone disease is a common condition with a high recurrence rate and elevated costs. Despite the well-known positive effects of high fluid intake, there are little data about the roles of water composition and timing of ingestion during the day. This study examines the effect of two different waters [calcium-bicarbonate water (CBW) and oligomineral water (OW)] consumed at different times during the day on urine composition in a group of healthy volunteers. In a cross-over randomized trial, 12 healthy volunteers were assigned to a different sequence of four combined interventions (1 L of water consumed during fasting and 1 L of water consumed with meals): CBW/OW; OW/CBW; CBW/CBW; OW/OW. Participants were instructed to follow the same diet and to avoid smoking, caffeine and other beverages during the day of intervention, and to collect their urine every 2 h during the day, followed by a single overnight collection. The relative supersaturation for calcium oxalate was higher for CBW/CBW compared with all other interventions, while relative supersaturation for calcium phosphate was lower for the combination OW/CBW with meals. Urinary excretion of oxalate was lower in all interventions including CBW, while no significant diffe...Continue Reading

References

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Jun 6, 2019·Journal of Nephrology·Pietro Manuel FerraroGiovanni Gambaro

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