Acid-base balance and hydration status following consumption of mineral-based alkaline bottled water

Daniel P Heil

doi:10.1186/1550-2783-7-29

Abstract

BackgroundThe present study sought to determine whether the consumption of a mineral-rich alkalizing (AK) bottled water could improve both acid-base balance and hydration status in young healthy adults under free-living conditions. The AK water contains a naturally high mineral content along with Alka-PlexLiquid™, a dissolved supplement that increases the mineral content and gives the water an alkalizing pH of 10.0.MethodsThirty-eight subjects were matched by gender and self-reported physical activity (SRPA, hrs/week) and then split into Control (12 women, 7 men; Mean +/- SD: 23 +/- 2 yrs; 7.2 +/- 3.6 hrs/week SRPA) and Experimental (13 women, 6 men; 22 +/- 2 yrs; 6.4 +/- 4.0 hrs/week SRPA) groups. The Control group consumed non-mineralized placebo bottled water over a 4-week period while the Experimental group consumed the placebo water during the 1st and 4th weeks and the AK water during the middle 2-week treatment period. Fingertip blood and 24-hour urine samples were collected three times each week for subsequent measures of blood and urine osmolality and pH, as well as total urine volume. Dependent variables were analyzed using multivariate repeated measures ANOVA with post-hoc focused on evaluating changes over time within Control and Experimental groups (alpha = 0.05).ResultsThere were no significant changes in any of the dependent variables for the Control group. The Experimental group, however, showed significant increases in both the blood and urine pH (6.23 to 7.07 and 7.52 to 7.69, respectively), a decreased blood and increased urine osmolality, and a decreased urine output (2.51 to 2.05 L/day), all during the second week of the treatment period (P < 0.05). Further, these changes reversed for the Experimental group once subjects switched to the placebo water during the 4th week.ConclusionsConsumption of AK water was associated with improved acid-base balance (i.e., an alkalization of the blood and urine) and hydration status when consumed under free-living conditions. In contrast, subjects who consumed the placebo bottled water showed no changes over the same period of time. These results indicate that the habitual consumption of AK water may be a valuable nutritional vector for influencing both acid-base balance and hydration status in healthy adults.

Highlights

The present study sought to determine whether the consumption of a mineral-rich alkalizing (AK) bottled water could improve both acid-base balance and hydration status in young healthy adults under free-living conditions
The remaining 40 subjects were evenly matched by gender and self-reported physical activity (SRPA) before assignment into the Control and Experimental groups
Study Implications The results from this study suggest that the regular consumption of mineral-rich bottled water with the AlkaPlexLiquidTM supplement can have measureable influences on markers for acid-base balance and hydration status when consumed under free-living conditions

Summary

Introduction

The present study sought to determine whether the consumption of a mineral-rich alkalizing (AK) bottled water could improve both acid-base balance and hydration status in young healthy adults under free-living conditions. Chronic low-grade metabolic acidosis, a condition associated with “the Western diet” (i.e., high dietary intake of cheese, meats, and processed grains with relatively low intake of fruits and vegetables) has been linked with indicators of poor health or health risk such as an increased association with cardiometabolic risk factors [1], increased risk for the development of osteoporosis [2], loss of lean body mass in older adults [3], as well an increased risk for sudden death from myocardial infarction [4,5]. Given the evidence linking more acidic diets with increased risk for the development of chronic disease states, there is growing interest in using alkaline-based dietary interventions to reverse these associations. Burckhardt [7] has suggested that the purposeful consumption of mineral water represents one of the most practical means for increasing the nutritional alkali load to the body

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