{"entity":{"id":"rejuv-frontier-ozone-therapy","kind":"technology","name":"Ozone therapy","aka":[],"tldr":"Ozone is sold to survivors as an infusion of ozonated blood, a rectal insufflation or an injection, for immunity, energy and detoxification. The United States regulation on the subject opens with a sentence worth reading in full: \"Ozone is a toxic gas with no known useful medical application in specific, adjunctive, or preventive therapy.\"","summary":"Medical ozone is delivered as major autohaemotherapy, in which blood is withdrawn, mixed with an ozone and oxygen mixture and returned, or as rectal insufflation, or by injection into tissue. It is marketed for immune support, fatigue, detoxification and, in some clinics, for the cancer itself.\n\nThe regulatory position in the United States is explicit. 21 CFR 801.415, headed \"Maximum acceptable level of ozone\", begins: \"Ozone is a toxic gas with no known useful medical application in specific, adjunctive, or preventive therapy. In order for ozone to be effective as a germicide, it must be present in a concentration far greater than that which can be safely tolerated by man and animals.\" The regulation goes on to describe irritation of the mucous membranes as the predominant effect, notes that inhalation can cause pulmonary oedema with onset delayed for hours, and deems a device adulterated or misbranded if used \"in any medical condition for which there is no proof of safety and effectiveness\".\n\nThe clinical literature is thin and uncontrolled. A 2025 scoping review of ozone for pain, fatigue, anxiety and depression in people with cancer mapped 16 reports and concluded that effectiveness had been \"preliminarily verified\" and that larger studies with longer follow-up were needed; a scoping review that maps reports is not a test of efficacy, and the field has no adequately powered randomised trial. Set against a regulation that calls the agent toxic and the risk of air embolism from injecting gas, the honest grade is harm, not merely insufficient.","status":"emerging","asOf":"2026-10-02","wikipedia":"https://en.wikipedia.org/wiki/Ozone_therapy","links":[{"label":"21 CFR 801.415: maximum acceptable level of ozone","url":"https://www.govinfo.gov/content/pkg/CFR-2023-title21-vol8/xml/CFR-2023-title21-vol8-sec801-415.xml"},{"label":"Medical ozone treatment for pain, fatigue, anxiety, and depression in cancer patients: a scoping review (Front Psychol 2025)","url":"https://doi.org/10.3389/fpsyg.2025.1687754"}],"tags":["rejuvenation","survivorship","evidence:harm","unproven","regulator-warning"],"related":[],"cancers":[],"sections":["rejuvenation","supportive-care"],"technologies":["alternative-medicine-instead-of-treatment","gerson-therapy-detox-regimens"],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":["b-survivorship"],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"principle":"Proponents argue that controlled oxidative stress upregulates antioxidant defences such as Nrf2. Ozone is a strong oxidant that reacts with lipids and proteins on contact; the dose window between an effect and injury is the problem, and it is the reason the US regulation treats it as a toxic gas rather than a therapy.","strengths":["Inexpensive to generate, which is part of why it is widely offered"],"limitations":["US regulation states it is a toxic gas with no known useful medical application","Inhalation can cause delayed pulmonary oedema; olfactory fatigue makes smell an unreliable warning","Injection of gas carries an air embolism risk","No adequately powered randomised trial in people with cancer","Sometimes offered in place of standard treatment, which is the harm that matters most"]},"route":"/technologies/rejuv-frontier-ozone-therapy/","neighbours":{"section":[{"id":"rejuvenation","kind":"section","name":"Recovery & Rejuvenation","route":"/fronts/rejuvenation/"},{"id":"supportive-care","kind":"section","name":"Supportive Care & Survivorship","route":"/fronts/supportive-care/"}],"technology":[{"id":"alternative-medicine-instead-of-treatment","kind":"technology","name":"Alternative medicine used instead of standard treatment","route":"/technologies/alternative-medicine-instead-of-treatment/"},{"id":"gerson-therapy-detox-regimens","kind":"technology","name":"Gerson therapy, coffee enemas and 'detox' regimens","route":"/technologies/gerson-therapy-detox-regimens/"},{"id":"rejuv-frontier-what-works","kind":"technology","name":"What actually works after treatment","route":"/technologies/rejuv-frontier-what-works/"}],"bottleneck":[{"id":"b-survivorship","kind":"bottleneck","name":"Survivorship and late effects are neglected","route":"/bottlenecks/b-survivorship/"}]}}