A medical guide to ozone therapy benefits, evidence for pain and wounds, safety concerns, regulatory limits, contraindications and what to ask before treatment.
Ozone therapy is a medical intervention that uses a controlled oxygen-ozone mixture through non-inhaled routes. It may be useful as an adjunct for musculoskeletal pain, knee osteoarthritis and selected chronic wounds, but it is not a universal cure, it does not replace standard treatment and it is not proven as a longevity therapy.
Current search results for ozone therapy tend to split into two camps: commercial pages promising benefits for almost everything, and skeptical pages that dismiss the field without separating indication, route and evidence quality. The useful position is more precise: medical ozone should be judged by the condition, route, dose, protocol, comparator and safety controls.
Quick answer: ozone therapy in 2026
- What it is: an O₂-O₃ mixture generated by medical equipment and delivered through routes such as local injection, autohemotherapy, rectal insufflation or topical application. It is never inhaled.
- Best-supported uses: musculoskeletal pain and knee osteoarthritis, mainly short- to medium-term pain relief. Methodological quality is still uneven.
- Promising uses: chronic wounds and diabetic foot ulcers as add-ons to standard care; some studies report better healing and fewer amputations, but results are heterogeneous.
- Weak or emerging evidence: post-viral fatigue, systemic inflammation and longevity. These should be framed as hypotheses, not guarantees.
- Safety: do not inhale ozone, do not inject ozone gas directly into a vein, and do not proceed without medical history, contraindication review and informed consent.
What the evidence does NOT show
- It does not show that ozone therapy cures diseases on its own.
- It does not show human rejuvenation or lifespan extension.
- There is no FDA-approved indication in the United States.
- It does not replace exercise, weight loss, indicated pain medication, physiotherapy, wound care, antibiotics, vascular surgery or orthopedic surgery when those are needed.
What ozone therapy is, and what it is not
Medical ozone therapy is not breathing ozone. Inhaling ozone irritates the respiratory tract and can injure the lungs. It is also not a magic way to oxygenate the blood or detoxify the body. It is an intervention designed to create a brief, controlled oxidative signal that may activate adaptive responses: endogenous antioxidant pathways, inflammation modulation, microcirculation and immune signaling.
The mechanism is usually described as hormesis: a small stressor that triggers a repair response larger than the stimulus itself. When ozone contacts blood, plasma, synovial fluid or tissue, it reacts quickly and generates reactive oxygen species and lipid oxidation products. Sagai and Bocci described this framework in Medical Gas Research: ozone is not a direct antioxidant; it creates a redox signal that can activate Nrf2, SOD, catalase, glutathione peroxidase and other cellular defenses.
The same mechanism explains the safety margin. Too little may do nothing; too much, or the wrong route, can irritate or injure tissue. Route, concentration, volume and frequency matter.
Ozone therapy benefits: evidence by indication
The question “what are the benefits?” needs a table, not a generic list. Evidence changes sharply by use case.
| Indication | What the evidence says | Prudent clinical reading |
|---|---|---|
| Knee osteoarthritis and musculoskeletal pain | This is the best-studied area. A 2024 umbrella review analyzed 8 systematic reviews, 15 RCTs and 3,685 patients; it found pain-relief signals, but all reviews had critically low confidence ratings. | May be considered as an adjunct pain option in selected profiles, not as guaranteed cartilage regeneration. |
| Disc herniation and low back pain | Studies and clinical series report favorable outcomes, but techniques, designs and comparators vary. | Should sit inside a pain and rehabilitation plan after clear diagnosis and review of alternatives. |
| Chronic wounds and diabetic foot ulcers | 2024 meta-analyses report better healing, shorter hospital stays and possible amputation reductions when ozone is added to standard care. | Adjunct only; it does not replace offloading, glucose control, debridement, antibiotics when indicated or vascular care. |
| Post-viral or post-COVID fatigue | A 2026 retrospective study of 40 patients reported improvements in fatigue, anxiety, sleep and quality of life after 10 major autohemotherapy sessions. | Interesting signal, but not enough to promise efficacy. Larger outpatient RCTs are needed. |
| Chronic inflammation / inflammaging | Mechanistic plausibility and small biomarker studies exist, but preventive medicine data are limited. | If used, it needs a biomarker, a goal and follow-up. It does not replace exercise, sleep, nutrition or cardiometabolic care. |
| Longevity | No clinical trials show longer lifespan, validated biological-age reversal or rejuvenation in humans. | Should only be presented as a measured adjunct inside selected protocols, not as a proven anti-aging therapy. |
Knee osteoarthritis: the strongest signal, with limits
Knee osteoarthritis is where the data-based conversation is strongest. The 2024 Frontiers in Physiology umbrella review summarized systematic reviews of randomized trials and found that several reviews reported pain reduction versus placebo. It also flagged a serious problem: review and trial quality was low or heterogeneous. In plain terms, there is a clinical signal, but not perfect proof.
In 2025, a double-blind trial in Advances in Rheumatology compared 20 µg/mL and 40 µg/mL intra-articular ozone with oxygen in 59 patients. Both ozone doses improved pain and mobility versus control, with no clear difference between 20 and 40 µg/mL, and follow-up was only two months. The lesson is not “more ozone is better”; if anything, it is the opposite: the higher dose added no benefit in that study.
For someone with knee pain, the practical question is: are we seeking pain relief, function, a bridge while strength and weight loss improve, a way to delay a steroid injection, or an alternative when surgery is already indicated? The indication changes with the answer. Standard options still include education, therapeutic exercise, weight loss when relevant, pain medication or NSAIDs when safe, selected injections and surgery when advanced osteoarthritis justifies it.
Chronic pain: useful only if it does not become a shortcut
A 2024 randomized trial in Pain Physician studied 51 patients with chronic musculoskeletal pain and abnormal mitochondrial redox state. Ozone injections, alone or with betamethasone, reduced pain compared with betamethasone at several follow-up points and improved redox markers. That is interesting, but the sample was small and it does not make ozone a universal first-line treatment.
For athletes or active adults over 40, ozone should not hide a load problem. If you have padel elbow, runner’s knee or tendinopathy, the foundation is still diagnosis, load, strength, sleep and recovery. Our guide to sports pain after 40 explains that framework.
Diabetic foot and wounds: adjunct, not replacement
Chronic wounds are a field where ozone’s antimicrobial and local modulation effects make more biological sense. Two 2024 systematic reviews and meta-analyses on diabetic foot ulcers reported benefits in healing and clinical outcomes when ozone was added to usual care. The key phrase is usual care. In diabetic foot disease, ozone does not replace offloading, glucose control, wound care, vascular assessment, antibiotics when needed or surgical judgment.
Post-viral fatigue: still a young hypothesis
Post-COVID fatigue and post-viral symptoms have increased interest in major ozone autohemotherapy. A 2026 Frontiers in Medicine study reviewed records from 40 patients with post-COVID syndrome who received 10 sessions and reported improvements in fatigue, anxiety, depression, sleep and quality of life. As a retrospective study, it cannot reliably separate treatment effect from spontaneous recovery, placebo effect, rehabilitation or patient selection.
Regulation and safety: the part many pages hide
The regulatory debate cannot be brushed aside. In the United States, federal regulation 21 CFR 801.415 describes ozone as a toxic gas with no known useful medical application in specific, adjunctive or preventive therapy, and warns about inhalation risk. That does not make every clinical study outside the U.S. meaningless; it does mean serious pages should acknowledge that regulatory acceptance is uneven and indications depend on country, route and device.
In Spain, the practical legal frame depends on the autonomous communities. AEPROMO states that 15 of Spain's 17 autonomous communities have issued directives so ozone therapy can be practiced legally in private centers in their territories, and that it is also used in Spanish public hospitals. The prudent reading is this: it should be delivered as a medical or healthcare act within professional competence, in an authorized center, with suitable equipment, written protocols, informed consent, traceability and clinical responsibility. A clinic saying “medical ozone” is not enough.
The ISCO3 Madrid Declaration is a professional consensus reference for ozone therapists; it should not be confused with universal public approval or first-line clinical guidance for every condition. The 4th edition was approved by ISCO3 on April 18, 2025 and officially launched in Madrid on June 5, 2025; AEPROMO describes it as an expanded and updated version of the 2020 edition.
Before booking, ask this
- What diagnosis or indication justifies ozone in my case?
- Which route will be used: injection, autohemotherapy, rectal, topical or another route?
- What dose, concentration, volume and number of sessions is proposed?
- Which contraindications have been checked, including G6PD when relevant?
- Which standard alternative exists, and why is it not first choice?
- Which marker or score decides whether we continue, change or stop?
Routes of administration: they do not mean the same thing
| Route | Typical use | Safety note |
|---|---|---|
| Local injection | Osteoarthritis, joint pain, trigger points, selected low back pain. | Requires medical technique, defined dosing and a clear diagnosis. |
| Major autohemotherapy | Systemic goals: inflammation, recovery, selected integrative indications. | Blood is drawn, mixed with O₂-O₃ in a closed circuit and reinfused. This is not direct gas injection into a vein. |
| Rectal insufflation | Non-IV systemic alternative in some protocols. | Concentration and volume must stay within safety ranges; digestive discomfort can occur. |
| Topical / ozonated oil or water | Wounds, ulcers, dermatology and dentistry depending on case. | Should be integrated with standard wound care and infection control. |
| Vaginal | Selected gynecological use. | Requires indication and gynecological assessment; it does not replace diagnosis of infection or lesions. |
One red line matters: ozone is not inhaled. Home environmental ozone generators marketed as therapeutic purifiers are not medical treatment. Airborne ozone is a lung irritant.
Contraindications and side effects
Studies often report few serious adverse events when ozone therapy is delivered through medical protocols. Still, “few published events” is not the same as “zero risk”, and safety depends heavily on route, dose, materials, training and patient selection.
Contraindications to review
- Glucose-6-phosphate dehydrogenase (G6PD) deficiency, because of hemolysis risk.
- Pregnancy or breastfeeding, unless there is a very specific medical indication.
- Uncontrolled hyperthyroidism or active Graves’ disease.
- Active bleeding, relevant coagulation disorders or complex anticoagulation.
- Cardiovascular instability, uncontrolled arrhythmia or severe acute disease.
- Anemia, thrombocytopenia, active infection or frailty that changes the risk-benefit balance.
Possible side effects
Depending on route, side effects may include local pain or irritation, bruising, pressure sensation, rectal or vaginal discomfort, vasovagal dizziness, transient tiredness or local reaction. Serious events are uncommon in expert hands, but possible: infection from poor technique, hemolysis in undetected G6PD deficiency, embolism if gas is handled dangerously, and lung injury if inhaled.
Ozone therapy and longevity: honest medicine means measuring
Ozone therapy appears in many longevity protocols because it touches interesting pathways: Nrf2, controlled oxidative stress, inflammation, microcirculation and immune signaling. That fits concepts such as inflammaging, mitochondrial dysfunction and the hallmarks of aging.
But mechanism is not proof of rejuvenation. In longevity medicine, a serious indication should answer three questions: what measurable problem exists, which biomarker should change and when do we stop if it does not? If we are discussing inflammation, we may track hsCRP, suPAR or other markers depending on the case. If we are discussing pain, we track pain, function, sleep and load. If we are discussing recovery, we track fatigue, performance, HRV, sleep and blood work. Without measurement, therapy becomes a story.
That is why ozone therapy belongs next to our guides on evidence-based biohacking, longevity biomarkers and NAD+ therapy. The question is not how many therapies you can stack; it is which one changes a specific clinical decision.
Ozone therapy at Progevita
At Progevita, ozone therapy is considered part of a medical protocol, not a standalone treatment or a detox promise. It is supervised by Dr. Vivian Borroto within a clinical team that reviews symptoms, medical history, medication, blood work, inflammation, body composition, sleep and goals.
It may be part of programs such as Inflammaging, Women’s Vital Path or Optimization when there is an indication. Individual sessions are available from EUR 80, and the decision depends on route, objective, contraindications and follow-up. If there is no measurable goal, adding it because it is fashionable does not make sense.
The clinic is located at the Balneario de Cofrentes, one hour from Valencia, Spain, with thermal surroundings, a medical team and programs that combine diagnostics, treatments and habits. To assess whether it fits your case, you can book a medical orientation call.
Frequently asked questions
Does ozone therapy cure disease?
It should not be presented that way. It may relieve pain or support selected processes as an adjunct, but it does not replace diagnosis or standard treatment. In chronic disease, the question is whether it adds something measurable to usual care.
Is it better than corticosteroids or hyaluronic acid?
It depends on condition, patient and goal. In knee osteoarthritis, some reviews compare ozone with placebo, corticosteroids or hyaluronic acid, but evidence quality and protocols vary. There is no universal answer.
How many sessions are needed?
It depends on route and objective. Joint pain protocols often use cycles of several sessions; systemic protocols also work in cycles. The key is not a fixed number, but reviewing clinical response and stopping criteria.
Can it be combined with NAD+, plasma exchange or fasting?
It can be combined when there is a medical rationale, but not by automatic stacking. NAD+ therapy, therapeutic plasma exchange, fasting and ozone therapy have different evidence levels, risks and goals. Define the problem first; choose the intervention second.
Is it the same as ozone air pollution?
No. Inhaled environmental ozone is an irritating pollutant. Ozone therapy uses a controlled O₂-O₃ mixture generated by medical equipment and applied through non-inhaled routes. Even so, “medical” does not remove the need for dose, indication and safety controls.
References
- Sagai M, Bocci V. “Mechanisms of Action Involved in Ozone Therapy: Is healing induced via a mild oxidative stress?” Medical Gas Research. 2011;1:29. PMID: 22185664.
- Cumpián-Silva KA et al. “The role of ozone treatment as integrative medicine. An evidence and gap map.” Frontiers in Public Health. 2022. Frontiers.
- Lino VTS et al. “Efficacy and safety of ozone therapy for knee osteoarthritis: an umbrella review of systematic reviews.” Frontiers in Physiology. 2024;15:1348028. Frontiers.
- Arjmanddoust Z, Nazari A, Moezy A. “Efficacy of two doses of intra-articular ozone therapy for pain and functional mobility in knee osteoarthritis: a double-blind randomized trial.” Advances in Rheumatology. 2025;65:11. DOI: 10.1186/s42358-025-00443-w.
- Eldemrdash A et al. “Efficacy of Medical Ozone for Treatment of Chronic Musculoskeletal Pain with Abnormal Mitochondrial Redox State.” Pain Physician. 2024;27(4):E371-E382. PMID: 38805526.
- Izadi M et al. “Effect of Ozone Therapy on Diabetes-related Foot Ulcer Outcomes: A Systematic Review and Meta-analysis.” Current Pharmaceutical Design. 2024;30(27):2152-2166. PMID: 38982924.
- Filho MLES et al. “Ozone therapy as a treatment for diabetic foot ulcers: a systematic review and meta-analysis.” Journal of Wound Care. 2024;33(12):958-967. PMID: 39630555.
- Kuculmez O. “Efficacy of major ozone autohemotherapy in patients with post-COVID syndrome.” Frontiers in Medicine. 2026;13:1720578. Frontiers.
- 21 CFR § 801.415. “Maximum acceptable level of ozone.” Legal Information Institute / e-CFR. Cornell LII.
- ISCO3. “Madrid Declaration on Ozone Therapy.” 4th edition, 2025. English digital edition, 195 pages. AEPROMO.
- AEPROMO. “Legal status of ozone therapy.” Updated in 2024. AEPROMO.
- López-Otín C et al. “Hallmarks of aging: An expanding universe.” Cell. 2023;186(2):243-278. PMID: 36599349.
This article is educational and does not replace individual medical consultation. Ozone therapy should be prescribed and supervised by qualified healthcare professionals, with informed consent, contraindication review and follow-up.
Related articles
Arthritis prevention and joint health: inflammation, movement and Mediterranean lifestyle
Joint health is not built by one supplement. It depends on inflammation, strength, body composition, vitamin D status, sleep, Mediterranean nutrition and well-dosed movement.
Why we launch Progēvita
My parents are physicians and have been running a large family-owned clinic for 30 years. When I incorporated to the family business already 15 years ago, I agreed with my father that I would not just operate the business he had founded but make it my vision.
Don't die
For some people Bryan Johnson might be an eccentric millionaire, his methodology might be questionable, even his business model is dubious, but over the last few years he has become an incredible asset to the longevity field.
Therapeutic Fasting: What It Is, How It Works and What the Science Says
Therapeutic fasting isn't a diet — it's a medically supervised metabolic reset that activates autophagy, improves insulin sensitivity, and reduces inflammation. Complete guide on fasting types, biological mechanisms (AMPK, mTOR, sirtuins), evidence-backed benefits, contraindications, and how we apply it at Progevita.