SUNRIDGE MEDICAL • INTEGRATIVE ONCOLOGY
Blood Ozone Therapy and Cancer & Viruses: Major Autohemotherapy, Redox Signaling & Integrative Research
Blood ozone therapy—more precisely called major ozone autohemotherapy or major autohemotherapy—has attracted interest in integrative medicine because controlled exposure of a patient’s blood to an oxygen-ozone mixture can trigger redox, metabolic, circulatory and immune-signaling responses.
Research has explored these effects in cancer supportive care, tumor biology, chronic viral illness and inflammatory conditions. At Sunridge Medical in Scottsdale, Arizona, ozone autohemotherapy may be considered as part of a physician-directed integrative treatment program when appropriate for the individual patient.
The treatment described on this page is fundamentally different from breathing ozone or injecting ozone gas directly into a vein. Major autohemotherapy treats withdrawn blood outside the body before reinfusion.
Major autohemotherapy treats withdrawn blood outside the body with a controlled oxygen-ozone mixture before reinfusion.
MAJOR AUTOHEMOTHERAPY
What Is Major Ozone Autohemotherapy?
During major autohemotherapy, a measured amount of venous blood is withdrawn into a sterile anticoagulated system, exposed outside the body to a controlled oxygen-ozone mixture, and then returned to the patient.
The important biological point is that ozone itself is extremely reactive and does not simply circulate through the body as ozone gas. When ozone contacts blood, it rapidly reacts with plasma antioxidants, lipids and proteins, producing transient signaling molecules that include hydrogen peroxide and lipid-oxidation products. These secondary molecules appear to account for much of the systemic biological response attributed to autohemotherapy.1
That distinction matters. Major autohemotherapy is not the same thing as direct intravenous injection of ozone gas.
CONTROLLED OXIDATIVE SIGNALING
Why Ozone Can Have Biological Effects
Ozone is a strong oxidizing molecule. At first glance, deliberately exposing blood to an oxidant may sound counterintuitive.
The concept behind medical ozone is that a brief, controlled oxidative exposure may stimulate adaptive antioxidant and cellular-defense mechanisms rather than simply create uncontrolled oxidative injury.
Experimental research has linked ozone preconditioning to activation of the Nrf2/EpRE pathway, a major cellular system governing antioxidant enzymes, redox balance and stress responses.2
This concept is sometimes referred to as oxidative preconditioning or oxidative hormesis.
DOSE MATTERS
Oxidative Hormesis Is Dose-Dependent
The dose matters. In an in-vitro study of ozonated human blood, moderate ozone exposures increased antioxidant-related responses without significant red-cell structural injury, while substantially higher ozone exposure produced more hemolysis and erythrocyte abnormalities.3
This is an important principle for medical ozone therapy: more ozone is not automatically better. Concentration, total dose, amount of blood treated and reinfusion strategy all influence the biological response.
MICROCIRCULATION • OXYGEN DELIVERY
Ozone Autohemotherapy and Oxygen Delivery
Cancer cells frequently exist within areas of tumor hypoxia, and hypoxia can contribute to aggressive tumor biology and resistance to radiation and some systemic therapies.
Clinical hemorheology research has reported improved red-cell properties and tissue oxygen delivery following ozonated autohemotransfusion in patients with impaired circulation.4
It is important not to oversimplify this into the claim that ozone simply “oxygenates cancer.” Tumor oxygenation is influenced by blood flow, abnormal tumor vessels, hemoglobin delivery, metabolism and local oxygen consumption.
CANCER RESEARCH
Blood Ozone Therapy and Cancer
The cancer research is intriguing but uneven.
Laboratory and animal experiments have investigated ozone in relation to apoptosis, tumor-cell proliferation, oxidative stress, tumor oxygenation and sensitivity to chemotherapy or radiation. Human oncology research is much smaller and has focused predominantly on supportive care rather than demonstrating tumor eradication or improved survival.5
This distinction is essential when discussing ozone in integrative oncology.
OXIDATIVE STRESS • APOPTOSIS
Ozone, Oxidative Stress and Cancer Cells
Cancer cells already operate under abnormal oxidative and metabolic pressure.
One hypothesis behind ozone oncology research is that controlled systemic oxidative signaling may increase cellular stress in malignant tissue while stimulating adaptive protective mechanisms in normal tissue.
Breast-cancer experiments have demonstrated ozone-associated mitochondrial changes, apoptosis and reductions in cancer-cell proliferation in preclinical models.6
That does not establish ozone as a stand-alone breast-cancer treatment, but it provides biological justification for studying ozone as an adjunctive therapy.
BREAST CANCER
Ozone and Breast Cancer Supportive Care
Breast cancer currently has some of the more interesting ozone literature.
A 2023 case series evaluated six women with breast cancer taking the aromatase inhibitor anastrozole who were experiencing substantial musculoskeletal pain, weakness and fatigue. After oxygen-ozone major autohemotherapy, investigators reported large reductions in pain and fatigue scores.7
Because the study included only six patients and had no randomized control group, it should be considered preliminary supportive-care evidence rather than proof of anticancer activity.
CANCER-RELATED PAIN
Ozone Therapy and Refractory Cancer-Treatment Pain
Ozone has also been investigated for difficult pain syndromes following cancer treatment.
A clinical study evaluated ozone therapy in patients with refractory pelvic pain secondary to cancer treatment after conventional pain approaches had failed. Significant symptom improvement was reported, although the investigators specifically called for blinded randomized trials to confirm the findings.8
For integrative oncology, symptom relief and treatment tolerance may be among the more immediately relevant clinical applications of ozone.
CHEMOTHERAPY & RADIATION
Could Ozone Affect Chemotherapy or Radiation Response?
Tumor hypoxia can contribute to radiation resistance, so improving tissue oxygenation has long been an area of oncology research.
Preclinical and small clinical reports have explored ozone as an adjunct to radiation and chemotherapy, but adequately powered randomized human cancer trials remain lacking.5
A 2024 experimental esophageal-cancer study found greater tumor suppression when ozone was combined with radiation than with either intervention alone in the studied model.9
The appropriate question is not simply whether ozone “makes chemotherapy work better.” It is whether a specific ozone strategy has evidence of favorable—or unfavorable—interaction with a particular treatment in a particular cancer.
Ozone research spans cancer biology, redox signaling and direct viral inactivation in laboratory settings.
VIRAL RESEARCH
Ozone Therapy and Viruses
The viral literature is particularly interesting because ozone can directly inactivate viruses outside the body.
That does not mean that ozone exposed to blood simply travels through the body killing viruses. These are two different concepts.
Any potential antiviral effect of autohemotherapy inside a patient would more plausibly involve downstream immune, inflammatory, redox or circulatory changes rather than ozone gas reaching infected tissues.
LABORATORY ANTIVIRAL CHEMISTRY
Ozone Can Directly Inactivate Viruses in the Laboratory
Ozone is capable of damaging viral proteins, membranes and nucleic acids under controlled conditions.
Early laboratory research demonstrated profound inactivation of HIV-1 after direct ozone exposure in vitro.10
Separate experiments demonstrated major reductions in resistant viral models and described ozone inactivation of influenza A and vesicular stomatitis virus under experimental conditions.11
That is genuine antiviral chemistry, but it should not be confused with proof that systemic autohemotherapy cures viral infection in humans.
HIV RESEARCH
Ozone Autohemotherapy and HIV
HIV was one of the first viral diseases studied with ozone-treated blood.
A small phase I study treated ten patients with ozone-exposed blood. No significant treatment toxicity was reported, and several immune markers changed in some participants. However, the study was very small and did not establish ozone as an effective treatment for HIV infection.12
Modern antiretroviral therapy remains the evidence-based standard for HIV.
HEPATITIS B
Ozone and Chronic Hepatitis B
A small randomized study evaluated medical ozone as an adjunct to basic treatment in 42 patients with chronic hepatitis B.
Patients receiving ozone plus basic treatment showed improvements in biochemical and virologic measures compared with controls after eight weeks.13
The trial was small and predates much of modern hepatitis B antiviral management, so the findings should be considered preliminary.
HEPATITIS C
Ozone and Chronic Hepatitis C
An early clinical study of chronic hepatitis C reported improvements in symptoms and liver enzymes and reported loss of detectable serum HCV RNA in a portion of treated patients.14
This work generated significant interest at the time, but it was performed before the modern era of highly effective direct-acting antivirals. Today, antiviral therapy remains the standard of care.
COVID-19
What the COVID-19 Studies Taught Us
COVID-19 produced a new wave of research into systemic ozone autohemotherapy.
Several small studies reported improvements in oxygenation, inflammatory markers, viral clearance or time to clinical improvement. A prospective case-control study associated ozonated autohemotherapy with a shorter time to clinical improvement.15
But randomized studies have produced mixed results. The multicenter randomized CORMOR study found improvement in a composite clinical endpoint at day seven but did not demonstrate reductions in mortality or mechanical intubation.16
A more recent randomized pilot study likewise did not demonstrate a statistically significant reduction in hospital stay with ozonated blood therapy.17
IMMUNE & INFLAMMATORY SIGNALING
Ozone, Inflammation and Immune Signaling
Viral illness and cancer both involve complex interactions between oxidative stress, inflammation and immune regulation.
Research into ozone biology has identified effects involving Nrf2-related stress responses and other cellular signaling systems.2
That is a better way to understand ozone than the vague phrase “immune boosting.” In cancer care, the goal is rarely to indiscriminately stimulate immunity, particularly in patients receiving checkpoint inhibitors, corticosteroids or other immune-modulating therapies.
SAFETY DISTINCTION
Major Autohemotherapy Is Not Direct IV Ozone Gas
Major autohemotherapy: blood is removed, exposed outside the body to a controlled oxygen-ozone mixture, and returned.
Direct IV ozone gas injection: gas is injected directly into the bloodstream.
These are not equivalent procedures. The treatment described on this page is ozonated autohemotherapy—not direct intravenous ozone gas injection.
Ozone should also not be inhaled. Federal regulations describe inhaled ozone as toxic to the respiratory system and capable of causing severe pulmonary irritation and pulmonary edema.18
U.S. REGULATORY STATUS
Ozone Therapy and U.S. Regulatory Status
Ozone autohemotherapy is not an FDA-approved treatment for cancer or viral infection.
Current U.S. federal regulations state that ozone is a toxic gas with no established useful medical application in specific, adjunctive or preventive therapy under the regulatory standard governing ozone-generating medical devices.18
This regulatory position should be stated clearly on a U.S.-based clinic website.
PHYSICIAN-DIRECTED CARE
Why Medical Supervision Matters
Ozone is not merely oxygen. Its biological effects depend on concentration, total ozone dose, amount of blood treated, anticoagulation, reinfusion strategy, treatment frequency, patient antioxidant status, hematologic status, current cancer treatment and cardiovascular or pulmonary condition.
Excessive ozone exposure can damage blood cells and biological tissues, demonstrating why the concept of “more ozone is better” is pharmacologically unsound.3
SUNRIDGE MEDICAL
Ozone Autohemotherapy at Sunridge Medical
At Sunridge Medical, blood ozone therapy is approached as a physician-directed integrative treatment rather than a stand-alone cure for cancer or viral disease.
The clinical context may include cancer diagnosis and stage, chemotherapy or radiation timing, immunotherapy, tumor burden, blood counts, liver and kidney function, coagulation status, infection history, medications, inflammatory and oxidative-stress patterns and other integrative therapies.
For some patients, the objective may be treatment support or symptom improvement. For others, ozone may be considered because of its effects on redox biology, circulation, inflammatory pathways or immune signaling.
FREQUENTLY ASKED QUESTIONS
Frequently Asked Questions About Blood Ozone Therapy
Is blood ozone therapy the same as injecting ozone gas?
No. Major autohemotherapy treats withdrawn blood outside the body with an oxygen-ozone mixture before reinfusion. Direct IV gas injection is a different procedure.
Does ozone kill cancer cells?
Ozone has produced cytotoxic, apoptotic and antiproliferative effects in experimental cancer models. Human evidence demonstrating tumor regression or improved survival from autohemotherapy remains inadequate.
Can ozone therapy improve cancer symptoms?
Small human studies have reported improvements in fatigue, musculoskeletal pain and refractory treatment-related pain, but larger randomized trials are needed.
Does ozone kill viruses?
Ozone can directly inactivate multiple viruses under laboratory conditions. That is different from proving that systemic autohemotherapy cures viral infection in humans.
Has blood ozone therapy been studied for viral infections?
Yes. Human studies have investigated HIV, hepatitis B, hepatitis C and COVID-19, but the quality and results vary substantially.
Can ozone autohemotherapy be used with chemotherapy?
It has been investigated as an adjunct to cancer treatment, but human evidence is limited. Treatment decisions should consider the specific drug, schedule and treatment objective.
Does Sunridge Medical use ozone autohemotherapy?
Major autohemotherapy may be considered within individualized physician-directed integrative treatment programs when clinically appropriate.
BECOME A PATIENT
Explore Physician-Directed Integrative Ozone Therapy
Blood ozone therapy is best understood as a controlled oxidative and redox-signaling intervention—not simply an oxygen treatment.
Speak with our Patient Care Team about your diagnosis, current treatment, chronic infection history and whether major autohemotherapy may fit within a broader integrative plan.
RESEARCH
References
- Bocci V. Biological and clinical effects of ozone. Has ozone therapy a future in medicine? PMID: 9795834.
- Re L, et al. Ozone therapy activates Nrf2-related antioxidant pathways and cellular adaptation. PMID: 25218903.
- Di Paolo N, et al. Effects of ozone exposure on human erythrocytes and antioxidant responses in vitro. PMID: 30018723.
- Giunta R, et al. Ozonated autohemotransfusion improves hemorheological parameters and tissue oxygenation. PMID: 11797116.
- Clavo B, et al. Ozone therapy as adjuvant in oncology: review of supportive and experimental evidence. PMID: 30271455.
- Experimental breast-cancer ozone study. Ozone-related mitochondrial effects, apoptosis and cancer-cell proliferation. PMID: 35936665.
- Breast-cancer supportive-care case series. Major autohemotherapy for anastrozole-associated pain and fatigue.
- Clavo B, et al. Ozone therapy in refractory pelvic pain secondary to cancer treatment. PMID: 32379556.
- Experimental esophageal-cancer study. Ozone combined with radiation in an experimental esophageal-cancer model. PMID: 38842109.
- HIV in-vitro ozone study. Direct ozone exposure and HIV-1 inactivation in vitro. PMID: 1717074.
- Virus inactivation research. Ozone inactivation of resistant viral models, influenza A and vesicular stomatitis virus. PMID: 9394395.
- HIV phase I study. Ozone-exposed blood therapy in patients with HIV infection. PMID: 1685651.
- Chronic hepatitis B study. Adjunctive medical ozone in chronic hepatitis B. PMID: 19544653.
- Chronic hepatitis C study. Ozone therapy in chronic hepatitis C. PMID: 21417811.
- COVID-19 case-control study. Ozonated autohemotherapy and time to clinical improvement in COVID-19. PMID: 33310665.
- CORMOR Study. Randomized multicenter ozone autohemotherapy study in COVID-19. PMID: 34186281.
- Randomized COVID-19 pilot study. Ozonated blood therapy in severe COVID-19. PMID: 40342580.
- U.S. Electronic Code of Federal Regulations. 21 CFR § 801.415 — Maximum acceptable level of ozone.
