I cant say i've noticed anything special after using it but I have been doing a serious health protocol for years now. Ozone alone does wonders let alone the rest what I do. I have no doubt that maybe someone not doing a protocol or a little one in early stages MAY feel some difference if something is causing a problem. I do believe in these pads and from the stuff I saw on my pad WOW it was alot. I used 2 pads one on each foot, Im looking at getting more and my mother is interested too. I found a place quite cheap for decent pads in england heres the link. I would like to have mine tested but I dont know anywhere in the U.K. I was thinking about asking Health Leads if they could do it with their syncrometer. Although you wouldn't know the levels you would know the substance.