What ozone is
Ozone is a molecule made of three oxygen atoms instead of the usual two. It is unstable and highly reactive. High in the atmosphere it shields the earth from ultraviolet light; at ground level it is an air pollutant, and breathing it causes airway inflammation, lower lung function, and worse asthma symptoms.
Medical ozone is made by a generator from pure medical oxygen, producing a measured mixture of oxygen and ozone. Ozone breaks down on its own, with a half-life of about 40 minutes at room temperature, so it is made fresh for each treatment and given at a set concentration, measured in micrograms per milliliter (µg/mL).
How ozone therapy is thought to work
The leading explanation is hormesis: a small, controlled stress that prompts the body to strengthen its own defenses. When ozone meets blood, it reacts almost instantly with fats and antioxidants in the plasma. That reaction produces short-lived messengers, mainly hydrogen peroxide and lipid oxidation products, which signal cells to make more of their own antioxidant enzymes through a pathway called Nrf2.
Dose matters. Laboratory work on human blood suggests that very low ozone doses are neutralized before they do anything, a middle range triggers the intended response, and high doses start to overwhelm the blood's antioxidant capacity. Most of this mechanism comes from laboratory and animal studies. How much of it translates into real benefit for people, and at what doses, is still being worked out.
How ozone therapy is administered
"Ozone therapy" covers several quite different procedures. The two most common in physician practices are IV ozone and ozone injections.
| Method | How it is given | Common use |
|---|---|---|
| IV ozone (major autohemotherapy) | A measured amount of your blood is drawn, mixed with ozone outside the body, and returned through the vein | Systemic, integrative plans |
| EBOO | A larger volume of blood is filtered and exposed to ozone outside the body, then returned | Systemic, integrative plans |
| Ozone injections (prolozone) | Ozone, sometimes with other solutions, is injected into a joint, tendon, ligament or muscle | Joint and soft-tissue pain |
| Disc and spine injections | Ozone is injected into or beside a herniated disc, usually under imaging | Low back pain from a herniated disc |
| Topical ozone and ozonated oils | Ozone gas under a sealed covering, or oils and water treated with ozone, applied to the skin | Wounds and skin |
| Dental ozone | Ozone gas applied to the teeth | Tooth decay and other dental uses |
| Rectal insufflation | A small volume of an oxygen and ozone mixture is introduced into the rectum | Systemic |
IV ozone, also called major autohemotherapy, is the most widely used systemic method. Published protocols draw roughly 100 to 300 mL of blood, mix it with a measured dose of ozone for a few minutes, and return it slowly through the same vein. I cover the procedure step by step in IV ozone therapy: how it works.
EBOO (extracorporeal blood oxygenation and ozonation) works on the same idea but treats a larger volume of blood outside the body than standard IV ozone.
Ozone injections, often called prolozone, place a small volume of an oxygen and ozone mixture into a painful joint or around tendons, ligaments and muscles. Injections into or beside a herniated spinal disc are a specialized version, usually done under imaging.
Dentistry is one of the most common settings for ozone. Dentists apply ozone gas to teeth, for example on early decay, to reduce the bacteria that cause it.
The one route that is never acceptable is breathing it. The lungs have little antioxidant protection, which is why inhaled ozone causes damage.
What ozone therapy is used for, and what the evidence shows
Ozone has been studied for a long list of conditions, from chronic wounds and diabetes to lung disease and immune disorders. The strongest research is on injections for joint and back pain, and even there the quality of the studies is low. Here is where the main uses stand.
Knee osteoarthritis
This is the most studied use. A 2024 umbrella review pooled eight systematic reviews covering 15 randomized trials and 3,685 patients. Three of the reviews found less pain with ozone than with placebo, but the authors rated confidence in every review as critically low. A 2026 meta-analysis of 16 randomized trials (1,172 patients) found that knee injections improved pain and function at one to two months, with the effect peaking at two months and gone by three. At six and twelve months, active treatments such as hyaluronic acid did better. Ozone looks like a short-term pain option for the knee, with repeat dosing still unproven.
Low back pain and herniated discs
A 2021 systematic review included 15 randomized trials with 2,597 patients. Ozone outperformed the comparison treatment in most of them and gave clinical results comparable to microdiscectomy, a surgery to remove the herniated part of the disc. None of the trials was rated good quality, though, and most carried significant bias. Benefits were reported in the short to medium term.
Diabetic foot ulcers and wounds
A Cochrane review found only three small trials (212 participants) with unclear methods and could not draw firm conclusions about whether ozone helps diabetic foot ulcers heal.
Dental care
A Cochrane review of the early trials on tooth decay found no reliable evidence that ozone stops or reverses the decay process, and called for better studies before ozone could replace standard dental care.
IV ozone for whole-body conditions
IV ozone is promoted for fatigue, immune support, chronic infection, autoimmune disease and more. The human evidence here is weaker than for injections: small and varied studies, few large controlled trials, and protocols that differ from clinic to clinic. A 2026 review of IV ozone in fibromyalgia concluded that it should still be considered experimental. Any clinic that promises a cure is overstating what is known.
Is ozone therapy safe?
Safety depends on the route, the dose and who is giving it. In the knee osteoarthritis reviews, side effects from injections were uncommon and mostly minor. Reported side effects with IV ozone include bruising at the IV site, fainting during the needle stick, rash or other allergic reactions, brief numbness of the lips or tongue from the anticoagulant used in the blood bag, and deep tiredness after a session.
Serious complications are rare, but they have been reported. A 2026 scoping review of IV ozone found case reports of red blood cell breakdown and kidney failure at ozone concentrations above 60 µg/mL, high potassium in people with complex kidney and heart disease, heart attacks, gas embolism to the brain in people with a hole between the heart's upper chambers (patent foramen ovale), reactions to equipment, and infections when sterile technique was broken. The authors noted that the true rate of serious events cannot be measured reliably because no prospective registries exist. Their key safety steps were G6PD screening, staying within recommended concentrations, slow reinfusion, cardiovascular review for selected patients, and strict sterile technique.
Inhaled ozone is harmful even in small amounts, which is why it must never be breathed in and why home ozone treatments are a bad idea.
Who should not have ozone therapy
Contraindications listed in published expert guidance include:
- G6PD deficiency (favism), an inherited enzyme condition that leaves red blood cells less able to handle oxidative stress
- Pregnancy
- Hyperthyroidism
- Sickle cell anemia
- Known allergy to ozone
- Treatment with certain anticoagulant (blood-thinning) drugs
- Severe heart rhythm problems, hypertensive crisis and other unstable cardiovascular disease
- Hemochromatosis, or current iron or copper therapy
A consultation, medication review and lab work, including a G6PD test, should come before the first session.
How ozone therapy is regulated
Ozone therapy is not FDA-approved for any condition. A federal regulation on ozone-producing devices, 21 CFR 801.415, states that ozone is a toxic gas with no known useful medical application in specific, adjunctive or preventive therapy. Physicians who use ozone do so as an unapproved therapy, and Cleveland Clinic describes ozone therapy as an unregulated alternative therapy. Dosing, equipment and training vary between providers, which makes the provider's screening, technique and honesty about the evidence especially important.
What a session is like and how many you need
An ozone joint injection is similar to other joint injections, usually given as a short series.
IV ozone takes longer because blood is drawn, treated and slowly returned. The concentration starts low and increases gradually. Plans in practice vary, and a good plan sets a defined number of sessions with a review of how you are responding before continuing.
How much does ozone therapy cost?
Prices vary widely between clinics, and insurance does not cover ozone therapy. The main cost factors are:
- The method: a single joint injection, IV ozone and EBOO are priced very differently
- The number of sessions in the plan
- Screening labs, including G6PD testing
- The initial consultation and follow-up visits
- Whether ozone is combined with other treatments in the same visit
Ask for a written quote covering the full plan, including screening, before you start.
Ozone therapy in Miami
I offer IV ozone and ozone injections in Miami as one part of an integrative plan, usually alongside established sports medicine care. Every patient has a consultation and screening, including G6PD testing, before the first session, and I'm direct about where the evidence is thin. If you want the details of an IV session, read IV ozone therapy: how it works. You can also see ozone therapy in Miami or book a consultation.
Frequently asked questions
What is ozone therapy?
Ozone therapy is a treatment that uses medical ozone, a reactive form of oxygen made from pure medical oxygen, either mixed with a patient's own blood and returned through a vein or injected into joints and soft tissue. It is not FDA-approved for any condition, and research on most uses is limited and mixed.
What does ozone therapy do?
The leading theory is that a small, controlled dose of ozone creates brief, mild oxidative stress, which prompts cells to turn up their own antioxidant and anti-inflammatory defenses. Studies of ozone injections suggest short-term pain relief in knee osteoarthritis and some types of back pain. Claims that it cures disease are not supported by the evidence.
How is ozone therapy administered?
The most common methods are IV ozone, in which a measured amount of blood is mixed with ozone outside the body and returned through the vein, and ozone injections into joints, tendons or the spine. Other routes include EBOO, topical ozone, ozonated oils and rectal insufflation. Ozone must never be inhaled.
Is ozone therapy safe?
Reviews of ozone injections for knee osteoarthritis report mostly minor side effects, and serious problems with IV ozone appear rare when standard protocols, screening and sterile technique are followed. Rare serious events have been reported, including red blood cell breakdown at high doses, gas embolism and infection. Inhaling ozone damages the lungs.
How much does ozone therapy cost?
Cost depends on the method, the number of sessions, screening labs and the consultation. A single joint injection, a series of IV ozone sessions and EBOO are priced very differently. Insurance does not cover ozone therapy, so ask the clinic for a full written quote before you start.
Is ozone therapy FDA-approved?
No. A federal regulation, 21 CFR 801.415, describes ozone as a toxic gas with no known useful medical application in specific, adjunctive or preventive therapy. Physicians who offer ozone use it as an unapproved therapy.
What is ozone therapy in dentistry?
Dentists apply ozone to teeth, for example on early tooth decay, to reduce the bacteria that cause it. A Cochrane review of the early trials found no reliable evidence that ozone stops or reverses tooth decay, so it is best seen as an add-on to standard dental care.
What is IV ozone therapy?
IV ozone, also called major autohemotherapy, draws a measured amount of your blood into a sterile container, mixes it with a set concentration of medical ozone for a few minutes, and returns it slowly through the same vein. Screening, including a G6PD test, should come before the first session.
Sources
- 21 CFR 801.415: Maximum acceptable level of ozone
- Cleveland Clinic: Ozone Therapy: What It Is and Why It's Risky (2022)
- Smith NL et al. Ozone therapy: an overview of pharmacodynamics, current research, and clinical utility. Med Gas Res, 2017
- Elvis AM, Ekta JS. Ozone therapy: a clinical review. J Nat Sci Biol Med, 2011
- Bocci V et al. Ozone acting on human blood yields a hormetic dose-response relationship. J Transl Med, 2011
- Zhuang ZG et al. Expert consensus of Chinese Association for the Study of Pain on the application of ozone therapy in pain medicine. World J Clin Cases, 2021
- Lino VTS et al. Efficacy and safety of ozone therapy for knee osteoarthritis: an umbrella review of systematic reviews. Front Physiol, 2024
- Chen F et al. The time-effect relationship of intra-articular ozone injection for knee osteoarthritis: a systematic review and meta-analysis. Front Pain Res, 2026
- Sconza C et al. Oxygen-ozone therapy for the treatment of low back pain: a systematic review of randomized controlled trials. Eur Rev Med Pharmacol Sci, 2021
- Liu J et al. Ozone therapy for treating foot ulcers in people with diabetes. Cochrane Database Syst Rev, 2015
- Evidence-Based Dentistry: No reliable evidence that ozone gas stops or reverses tooth decay (summary of the Cochrane review), 2005
- Casale R et al. Oxygen-ozone autohaemotherapy in fibromyalgia: safety profile and adverse events. A scoping review. Clin Exp Rheumatol, 2026
- U.S. EPA: Health effects of ozone in the general population