Probiotics are not the same as Anti-biotics my friend! You should supplement with these or Acidophilus regular to top up your good bacteria levels. Zapping destroys bacteria and it has been known for it to get to intestional bacteria also. Colloidal Silver has not been known to damage good bacteria but people try to be safe. I know people on Zappers and Colloidal Silver without probiotics and good diet. The wise person goes further and makes SURE theres no problems. These also cleanse the intestines and help boost the immune system. The Ozone will nourish the bacteria as they thrive in an aerobic (oxygenated) environment.