Ozone is three atoms of oxygen attached together, or O3. The Oxygen you are breathing right now is two atoms of oxygen attached together, or O2. They seem similar, however they have completely different effects on the human body.
Cancer cells die when exposed to oxygen (cancer cells are anaerobic). Ozone therapy through the blood involves removing part of the blood from the body, saturating this blood with oxygen (i.e. ozone--O3), then putting oxygen rich blood back into the body.
Ozone therapy should only be used by professional who have been fully trained in its use. The only contra-indications to ozone therapy are acute alcohol withdrawal, pregnancy, thyrotoxicosis, and acute heart attack. Ozone treatments can be used in a variety of ways depending on the individual clinical situation. Dosages, methods of administration, and treatment intervals are important considerations in order to obtain the greatest benefit. The most common ways of administration are rectally or through the blood.