... I've zapped four sessions so far and one of the most noticable improvements has been to a tooth that had a root canal. I read your column about the root canals and how they essentially seal in bacteria. Ever since I had the root canal, the tooth was still sore and the gums were sensitive. Even after the 4 sessions, I feel less sensitivity in the tooth I'm sure as a result of the bacteria being killed. My skin also looks much better and I've had really good energy. Love the product Ken! Thanks again, Pete S. Jan. 8, 2008