Ozone therapy is a form of alternative medicine treatment that purports to increase the amount of oxygen in the body through the introduction of ozone. This therapy has been proposed for use in various diseases, including cancer, AIDS, multiple sclerosis, arthritis, heart disease, and Alzheimer’s dementia, Lyme, among others. One proposed mechanism for its use in treating cancer comes from the proposed theory that cancer does not thrive or grow in a high-oxygen environment, and the ozone therapy will increase oxygen in the body and therefore help in cancer treatment.