Aim:
To demonstrates the effects of Hydrogen-rich water (HRW) on hydration by examining hematocrit, blood viscosity, and urine osmolality

Material and methods:
Hydrogen Evodrop rich water (HEW), produced from a patented device with hydrogen concentration therein 900-1200 ppb or 0.9-1.2 ppm, ORP (-450~ -580) mV, and pH=7.1-7.3. Blood viscosity, hematocrit and urine osmolality had been determined in 10 volunteers (five women and five men) during the 21-day period of intake of HEW and following a recommended diet.

Results:
No agglutination or abnormalities in erythrocyte morphology were detected in the participants. Urine osmolality in both men and women decreased after HRW consumption, likely due to improved hydration. However, osmolality before the consumption was higher in men compared to women. Both men and women exhibited statistically significant changes in hematocrit and blood viscosity parameters after consuming HEW which decreased. This suggests improved hydration and a reduction in blood viscosity.

Conclusions:
The results confirm that hydration effects in the human body can be achieved with hydrogen-rich water with a hydrogen concentration of 0.9-1.2 ppm, pH=7.2, and ORP (-450) mV. The findings of present research support the benefit of the use of HRW in promoting body hydration. The analysis suggest that hematocrit is more closely associated with other factors, such as hydration status and plasma volume following HEW consumption. HEW consumption consistently affected urine osmolality, which may reflect in overall hydration status. The results indicate a consistent effect of HEW on crucial blood parameters, reflecting its influence on blood consumption and fluid dynamics.