Authority Rank: Highest (Recent Meta-analysis of RCTs).

Study Title: Effectiveness of medical ozone injections into the intervertebral disc on relieving lumbosacral pain—a systematic review and meta-analysis

Source: Frontiers in Pain Research (2025)

Focus: This meta-analysis of 8 Randomized Controlled Trials (RCTs) involving over 1,700 patients found that ozone injections significantly reduced pain and improved function for patients with lumbar disc herniation.

Link to study: Read full text

Authority Rank: High (Systematic Review/Meta-analysis).

Study Title: Ozone therapy as a treatment for diabetic foot ulcers: a systematic review and meta-analysis

Source: Journal of Wound Care (2022)

Focus: This review analyzed the impact of ozone on diabetic wounds, concluding that patients receiving the therapy showed higher rates of healing, shorter hospital stays, and improved antioxidant activity.

Link to study: Read abstract

Authority Rank: High (Highly-cited comprehensive clinical review).

Study Title: Ozone therapy: A clinical review

Source: Journal of Natural Science, Biology and Medicine (via NIH/PubMed)

Focus: An extensive review of ozone’s pharmacodynamics, highlighting its ability to stimulate antioxidant enzymes, improve oxygen delivery, and act as an anti-inflammatory and germicidal agent.

Link to study: Read abstract

Authority Rank: Moderate (Prospective Controlled Trial).

Study Title: Effectiveness of ozone therapy in addition to conventional treatment on mortality in patients with COVID-19

Source: International Journal of Clinical Practice (2021)

Focus: This prospective controlled study investigated whether Major Autohemotherapy (ozonated blood) could reduce mortality in hospitalized COVID-19 patients, finding a statistically significant lower mortality rate in the ozone-treated group.

Link to study: Read abstract

Authority Rank: Low to Moderate (Mechanistic review; notes that while results are promising in lab settings, more clinical human trials are needed).

Study Title: Ozone therapy as adjuvant for cancer treatment: Is further research warranted?

Source: Evidence-Based Complementary and Alternative Medicine

Focus: Explores how ozone therapy might modify tumor hypoxia (oxygen deficiency) to potentially enhance the effectiveness of radiotherapy and chemotherapy.

Link to study: Read full text

• Primary Benefit: The strongest clinical evidence currently supports ozone therapy for musculoskeletal pain (specifically disc herniation) and chronic wound healing.
• Mechanisms: Ozone appears to work by inducing a “controlled oxidative stress” that triggers the body’s own antioxidant defenses and modulates the immune system.
• Safety Warning: Ozone is toxic to the lungs if inhaled; medical applications must use strictly controlled administration methods (injections, topical, transdermal or autohemotherapy).