Ozone therapy uses a controlled oxygen-ozone mix to reduce inflammation, modulate the immune system and improve tissue oxygenation. Here's what the science actually says.
Ozone therapy is a medical treatment that uses a controlled mixture of oxygen and ozone (O₃) to reduce inflammation, modulate the immune system and improve tissue oxygenation. It doesn't cure diseases directly — it activates the body's own defense and repair systems.
Medical ozone has been around for over a century. Werner von Siemens built the first ozone generator in 1857. During World War I it was used to disinfect wounds. Today it's applied in orthopedics, pain medicine, gynecology, vascular disease and — increasingly — in longevity protocols, where its ability to generate controlled oxidative stress triggers cellular repair pathways that the body stops activating with age.
But ozone therapy also carries confusion. Some clinics sell it as a miracle cure. Others dismiss it entirely. The reality is in the data. This article reviews what we know from published evidence, without inflating or minimizing.
How it works: the mechanism of action
Ozone doesn't work like a conventional drug that blocks a receptor or inhibits an enzyme. It works through hormesis: a low dose of oxidative stress that triggers an adaptive response stronger than the stimulus itself.
When ozone contacts biological fluids (blood, plasma, synovial fluid), it reacts within milliseconds and generates two types of messengers:
- Reactive oxygen species (ROS) — they disappear in seconds, but that brief pulse activates the Nrf2 pathway, the master genetic switch of the endogenous antioxidant system. The result: the body produces more superoxide dismutase (SOD), glutathione peroxidase and catalase. In other words, it activates its own defenses.
- Lipid oxidation products (LOPs) — longer-lived secondary messengers that improve oxygen release from red blood cells (via increased 2,3-DPG), stimulate bone marrow and modulate the immune response.
Sagai and Bocci described these mechanisms in detail in 2011 (PMID: 22185664). The key insight: ozone is not a direct antioxidant. It's a pro-oxidant that trains the body to become a better antioxidant on its own.
This explains why it works at controlled doses and is harmful in excess. The therapeutic window matters.
What ozone therapy is used for: applications ranked by evidence
Not all applications have the same level of evidence. Some have randomized controlled trials and meta-analyses. Others rely on case series. Let's separate them clearly.
Musculoskeletal pain and osteoarthritis (strong evidence)
This is the best-supported application. A 2022 evidence gap map published in Frontiers in Public Health (PMC: 9885089) identified 26 systematic reviews on ozone therapy, with the strongest evidence for pain reduction (42 positive associations), low back pain (18) and physical function improvement (19).
- Knee osteoarthritis: A meta-analysis by Fernández-Cuadros et al. (2020) reviewed 12 controlled trials and found that ozone injections significantly reduce pain and improve joint function, with results comparable to hyaluronic acid at lower cost.
- Disc herniation: Intradiscal and paravertebral ozone has a 70-80% success rate in observational studies, avoiding surgery in many patients.
- Chronic shoulder, hip and spinal pain: Multiple clinical series show 4-6 point VAS pain reductions after 6-10 session cycles.
The advantage over corticosteroids: ozone doesn't raise blood sugar, doesn't weaken tendons with repeated use, and has a minimal side-effect profile.
Chronic inflammation and immune modulation (moderate evidence)
This is where ozone therapy connects with longevity medicine. Low-grade chronic inflammation — what science calls inflammaging — accelerates aging and is the common ground of cardiovascular, metabolic and neurodegenerative diseases.
Systemic ozone (rectal or major autohemotherapy) modulates the immune response by:
- Regulating the balance of pro- and anti-inflammatory cytokines
- Activating NK cells and macrophages
- Reducing markers like IL-6 and TNF-α
Elvis and Ekta published a comprehensive clinical review documenting these effects (PMID: 22470233). A more recent pharmacodynamics overview in Medical Gas Research (PMC: 5674660) confirms these mechanisms and adds evidence on vascular endothelial protection.
Infections and wound healing (moderate evidence)
Ozone is one of the most powerful germicides in existence. Unlike antibiotics, it acts against bacteria, viruses and fungi simultaneously and doesn't generate resistance. It's used in:
- Diabetic foot: Reduction in amputations when combined with standard treatment
- Chronic wounds and ulcers: Improved healing through growth factor stimulation (VEGF, PDGF)
- Recurrent gynecological infections: A controlled trial with 50 patients with recurrent candidiasis showed 88% cure rate with vaginal ozone vs 56% with traditional antifungals, and recurrence of 4.5% vs 35.7%
Chronic fatigue and post-viral recovery (emerging evidence)
After the COVID-19 pandemic, several centers began using systemic ozone for post-viral syndrome. The biological rationale is sound: ozone improves tissue oxygenation, reduces persistent inflammation and modulates a dysregulated immune response. Published data is still limited to case series, but results are promising.
Longevity and aging (preclinical evidence + biological rationale)
The connection between ozone therapy and longevity is based on ozone acting on several of the 12 hallmarks of aging (López-Otín et al., Cell 2023, PMID: 36599349):
| Hallmark | Ozone mechanism |
|---|---|
| Mitochondrial dysfunction | Improves oxidative phosphorylation via increased O₂ availability |
| Inflammaging | Modulates cytokines, reduces chronic inflammation |
| Cellular senescence | Hormetic stress activates repair pathways |
| Altered intercellular communication | Improves redox signaling and nitric oxide release |
| Dysbiosis | Rectal route modulates gut microbiota |
There are no longevity clinical trials with ozone (there aren't with almost anything, because longevity is measured in decades). But the biological basis is solid and consistent with the current scientific framework.
At Progevita, we integrate ozone therapy within longevity protocols that include plasmapheresis, NAD+ IV therapy and a full panel of advanced diagnostics to measure the real effect of each intervention.
Types of ozone therapy: routes of administration
There isn't just one way to administer ozone. The route depends on what you're trying to treat.
| Route | Type | Used for | Duration |
|---|---|---|---|
| Local injection | Local | Osteoarthritis, disc herniation, joint pain | 10-15 min |
| Major autohemotherapy | Systemic | Chronic inflammation, immunity, longevity | 30-45 min |
| Minor autohemotherapy | Systemic | Allergies, skin conditions, immune support | 15-20 min |
| Rectal insufflation | Systemic | Intestinal inflammation, dysbiosis, systemic effect | 10-15 min |
| Ozonized IV saline | Systemic | Fatigue, infections, post-viral recovery | 20-40 min |
| Vaginal application | Local | Recurrent candidiasis, vaginal atrophy | 10-15 min |
Major autohemotherapy: the gold standard systemic route
This is the most studied protocol for systemic effects. Blood is drawn from the patient (100-200 mL), mixed with ozone at therapeutic concentration in a closed circuit, and reinfused. The process takes about 30-45 minutes.
It's the route with the most accumulated clinical experience and the preferred choice in longevity protocols because it allows precise dosing with a potent systemic effect.
Rectal insufflation: the non-invasive alternative
The rectum has a highly vascularized mucosa that absorbs ozone efficiently. 100-300 mL of oxygen-ozone mix is administered. It doesn't hurt. Takes about 10 minutes. Concentration must not exceed 40 µg/mL to avoid mucosal damage.
It's the preferred route for patients who want systemic effects without IV access. It also has a local effect on the gut microbiota: reducing pathogens and favoring a less inflammatory intestinal environment.
What to expect in an ozone therapy session
- Prior medical evaluation — The doctor reviews your history, current medication and rules out contraindications. This is mandatory. Any center that applies ozone without a prior medical consultation isn't meeting standards.
- Route and dose selection — Based on clinical indication, the administration route and ozone concentration (in µg/mL) are selected, adjusted to your weight and condition.
- Application — You'll lie down while the ozonized saline or autohemotherapy is administered (30-45 min), or it'll be a shorter session for local injections (10-15 min).
- After the session — No recovery time needed. You can resume normal activity immediately. Some patients notice a feeling of energy or lightness in the hours that follow.
Typical frequency: 8 to 16 sessions for a full cycle, 1-3 sessions per week. For longevity maintenance, cycles of 4-8 sessions every 3-6 months.
Contraindications and side effects
Ozone therapy has a high safety profile when applied by a trained professional with calibrated equipment. But it's not for everyone.
Absolute contraindications
- Glucose-6-phosphate dehydrogenase (G6PD) deficiency — this enzyme protects red blood cells from oxidative stress; without it, ozone can cause hemolysis
- Toxic hyperthyroidism (uncontrolled Graves' disease)
- Pregnancy and breastfeeding
- Significant active hemorrhage
- Severe cardiovascular instability
- Hemochromatosis
Relative contraindications
- Anemia with hemoglobin < 7 g/dL
- Thrombocytopenia < 50,000
- Uncontrolled hypertension
- IV treatment with copper or iron
Side effects
They're infrequent and mild: pain at the injection site if concentrations are too high, drowsiness after systemic sessions (clinically insignificant), vasovagal episodes (very rare, associated with overly rapid administration), and transient burning in vaginal applications that resolves within minutes in 88% of cases.
Ozone therapy doesn't carry the typical corticosteroid side effects (hyperglycemia, tendon weakening) and doesn't generate resistance like antibiotics.
Ozone therapy at Progevita
At Progevita, ozone therapy is part of our longevity programs under the supervision of Dr. Vivian Borroto, an internationally recognized specialist in medical ozone therapy.
We don't use it as a standalone treatment. We integrate it within protocols that combine advanced diagnostics (suPAR, Oxytest, inflammation panels), complementary treatments (NAD+ IV, plasmapheresis) and a 12-month habits plan.
Why this approach? Because ozone therapy alone improves specific markers, but combined with a comprehensive protocol — exercise, nutrition, sleep, other treatments — the effects compound. Plasmapheresis, for example, removes inflammatory proteins from plasma, creating a "clean slate" where ozone can act more effectively.
Ozone therapy is included in the Inflammaging program (from €1,470), Women's Vital Path (from €2,100) and as an add-on in the Optimization program. Individual ozone sessions are available from €80.
Our clinic is located at the Balneario de Cofrentes, one hour from Valencia, Spain — 200 hectares of natural surroundings, thermal waters and a team of over 50 medical professionals.
Want to learn more? Book an orientation call and we'll help you choose the program that best fits your goals.
Frequently asked questions
Is ozone therapy officially recognized?
Yes. The ISCO3 (International Scientific Committee of Ozone Therapy) published the Madrid Declaration in 2020 with recognized indications. In Spain, medical ozone is registered as a medical device and appears in the European clinical trials database. It's not covered by public healthcare, but it's legally practiced in authorized medical centers.
How many sessions before I notice results?
It depends on the indication. For joint pain, many patients improve from the 3rd-4th session. For systemic effects (inflammation, immunity), a full cycle of 8-16 sessions is typical. For longevity maintenance, cycles of 4-8 sessions every 3-6 months.
Does ozone therapy hurt?
Systemic routes (rectal, intravenous) don't hurt. Local injections may cause momentary discomfort, similar to any joint injection. The vaginal route may produce transient burning that resolves quickly.
Can it be combined with other treatments?
Yes, and it's actually more effective combined. At Progevita we integrate it with plasmapheresis, NAD+ therapy, orthomolecular IV drips and a complete lifestyle protocol. It shouldn't be combined with IV copper or iron medications.
How much does ozone therapy cost?
In Spain, individual sessions range from €50 to €150 depending on the route and clinic. At Progevita, sessions start from €80. Within longevity programs, ozone therapy is included in the program price.
Are there serious side effects?
Serious adverse effects are extremely rare when applied by a trained professional with calibrated equipment. The most serious possible complication is hemolysis in patients with undiagnosed G6PD deficiency, which is why screening for this enzyme is mandatory before treatment.
Is it the same as the "ozone" air pollutant?
No. Atmospheric ozone is a pollutant you breathe that damages airways. Medical ozone is a controlled oxygen-ozone mixture generated by calibrated medical equipment, administered through non-respiratory routes (never inhaled) at precise therapeutic concentrations. They are completely different things.
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)
- Elvis AM, Ekta JS. "Ozone therapy: A clinical review." Journal of Natural Science, Biology and Medicine. 2011;2(1):66-70. (PMID: 22470233)
- Smith NL et al. "Ozone therapy: an overview of pharmacodynamics, current research, and clinical utility." Medical Gas Research. 2017;7(3):212-219. (PMC: 5674660)
- Fernández-Cuadros ME et al. "Ozone Therapy for the Treatment of Knee Osteoarthritis: A Systematic Review and Meta-analysis." Ozone: Science & Engineering. 2020;42(5):370-380.
- Cumpián-Silva KA et al. "The role of ozone treatment as integrative medicine. An evidence and gap map." Frontiers in Public Health. 2022. (PMC: 9885089)
- Re L et al. "Ozone therapy in medicine: a review." European Review for Medical and Pharmacological Sciences. 2020.
- ISCO3. "Madrid Declaration on Ozone Therapy." International Scientific Committee of Ozone Therapy. 3rd edition, 2020.
- López-Otín C et al. "Hallmarks of aging: An expanding universe." Cell. 2023;186(2):243-278. (PMID: 36599349)
This article is for informational purposes and does not replace medical consultation. Ozone therapy should always be prescribed and supervised by a qualified healthcare professional.