That makes ozone therapy quackery. There are hundreds of published papers that demonstrate the many clinical benefits of ozone therapies. That makes ozone useful. My personal experience supports ozone therapists. Ozone gives me positive results in the majority of the patients for whom I use that therapy.
Ozone is a toxic free radical.
Ozone enhances tissue oxygenation. Free radicals lacerate every living thing in their way. That makes ozone a sharp dagger. We know that. Our patients know that.