Table 3. Characteristics of the water.

	Tap water	control	H-ERW	control-DMEM#	H-ERW-DMEM#
pH	8.3±0.1	7.9±0.2	10.5±0.1	7.2±0.1	7.2±0.1
ORP (mV)	144.3±14.9	113.7±21.8	−261.7±12.5	33.7±5.1	−34.2±4.2
DH (ppb, µg l−1)	2.4±0.4	6.2±1.2	510.8±21.9	1.8±1.0	78.5±20.1
ΔDH/Δt (µg l−1 h−1)*	N/A	N/A	−59.4±6.7	N/A	N/A

All measurements performed at room temperature (22±1°C). FW – filtered water (control); H-ERW – hydrogen-enriched electrochemically reduced water; ORP – oxido-reductive potential; DH – dissolved hydrogen; ΔDH/Δt – rate of decay (assumed linear); N/A – not available because of sensitivity limits of the instrument.

^#- measured at 37°C;

^*- estimated at room temperature in an open glass bottle with minimal agitation.