Figure 1: The principle of alternating current (AC) electrolysis for preparation of hydrogen-rich water. Note: (A) Generation of nanobubbles by AC electrolysis. The method used the Hayakawa Method (Patent No. for the Japan Patent Office: 5,435,894 2,615,308, 2,623,204). The high frequency switching circuit was selected within a range of 20–50 kHz and 10–50 V. (B) Polarization of water molecules and migration of protons towards the cathodal electrode interchanged at a cycle of 30 kHz in an AC-electrolysis tub.