The brochure says it's a patented process -- not telling their secrets. They say that it corrects pH and oxygenates the body.
You might want to get Ed McCabe's excellent book "Flood Your Body With Oxygen." There are many ways to get oxygen into the body. H202 is one, but there may be better ones. Ozone, etc.
Interesting that, at these clinics, they give up to three baths per day (50 min. each)so oxygen absorption by baths are a very important part of the therapy along with the oxygen wster. You would also be getting very hydrated.
Ed McCabe says your body is trying hard to get rid of toxins but you don't give it enough oxygen!! Sounds like oxygen therapy may be a missing link for healing.
I'm busy studying Ed McCabe's book. Much information. Who can afford to travel to Hungary?