Figure 4: Particle-size distributions in alternating current-electrolytically prepared hydrogen-rich water. Note: (A) Visualization of Brownian movement of nanoparticles by nanoparticle tracking analysis (NTA) using a laser beam tracing NanoSight LM20/NTA2.3 apparatus. (B) Size distribution (diameters versus numbers) of nanoparticles in hydrogen-rich water generated by alternating current-electrolysis of tap water for 30 minutes as measured by NTA. (C) Size distribution in hydrogen-rich water generated as in B and subjected to boiling and cooling. Nanoparticles after boiling were decreased to 1.9 × 107/mL, at a rate of 35.2%.