Short-term cardiovascular responses to ingestion of mineral water in healthy non-obese adults: Impact of mineral components

The role of mineral components in the hemodynamic response to water drinking is still elusive. We conducted a randomized crossover study in 16 non-obese, healthy subjects (8 women) to investigate cardiovascular responses to water drinks differing in the mineral content. Continuous measurements included beat-to-beat blood pressure, electrocardiography derived RR-intervals, and impedance cardiography for a 30 min baseline period with a subsequent 60 min post-drink period. In response to mineral water, but not distilled water, we observed significant time effects with decreases in heart rate and double product and increases in baroreflex sensitivity. Moreover, we observed a significant treatment difference in average heart rate responses starting 30 min after ingestion, where mineral water decreased heart rate to a greater extent than distilled water (p < 0.05). In young, healthy humans, drinking mineral water decreased heart rate in a time-dependent fashion, potentially due to its mineral properties.