Franke commissioned a university laboratory to conduct experiments assessing the difference between conventional hand washing and hand washing when the water has been ozonated. The results are very interesting.
A comparative study with commercially available soap solutions*
Four different hand washing treatments (ozonated water, soap and tap water, ozonated water and soap, and tap water) were utilized to study the reduction in total viable bacteria counts.
*Dr. S. Kurissery and Dr. N. Kanavillil, “Efficacy of ozonated water” — a commissioned study, Lakehead University, 2016
For a number of reasons, such as visibly soiled hands, Franke’s position is never to discourage the use of soap. The use of ozonated water for hand washing is only intended to improve upon current results.