Healing requires oxygen. After injury, surgery, or intense training, tissues may receive reduced oxygen due to swelling and compromised circulation. HBOT increases dissolved oxygen in plasma, allowing it to reach areas that are less accessible under normal conditions. 

How this might help

Increased oxygen availability supports processes involved in tissue repair, collagen synthesis, and new blood vessel formation. HBOT has been studied in wound care and late radiation tissue injury as an adjunct to standard medical care. 

Selected Research Studies

(For clinicians and advanced readers)

• Thom SR. Hyperbaric oxygen: its mechanisms and efficacy. Plast Reconstr Surg. 2011.
  https://pubmed.ncbi.nlm.nih.gov/21200283/

• Bennett MH et al. Hyperbaric oxygen therapy for late radiation tissue injury. Cochrane Database Syst Rev. 2016.
  https://pubmed.ncbi.nlm.nih.gov/27123955/

Inflammation is essential for healing, but when prolonged it may contribute to discomfort and delayed recovery. Experimental and clinical research suggests HBOT can influence inflammatory pathways and oxidative stress markers. 

How this might help

By enhancing oxygen delivery and microcirculation, HBOT may help modulate inflammatory markers and support the resolution phase of healing. In pre-clinical models of brain injury, HBOT reduced key inflammatory mediators via TLR4/NF-κB signalling. 

Selected Research Studies

• Meng XE et al. Hyperbaric Oxygen Alleviates Secondary Brain Injury After Trauma Through Inhibition of TLR4/NF-κB Signaling Pathway. Med Sci Monit. 2016.
  https://pubmed.ncbi.nlm.nih.gov/26812205/

• De Wolde SD et al. The Effects of Hyperbaric Oxygenation on Oxidative Stress, Inflammation and Angiogenesis. Biomolecules. 2021.
  https://pubmed.ncbi.nlm.nih.gov/34439876/

The brain is highly oxygen-dependent. Altered oxygen delivery has been associated with fatigue, reduced focus, and slower processing speed. HBOT has been explored as a way to support neuroplasticity and cerebral blood flow in selected neurological and cognitive conditions. 

How this might help

Clinical studies and reviews suggest HBOT may support aspects of cognitive performance (such as memory and attention) and brain microstructure in specific patient groups, including those with chronic post-concussion symptoms and post-stroke changes, when used alongside standard care. 

Selected Research Studies

• Boussi-Gross R et al. Hyperbaric Oxygen Therapy Can Improve Post Concussion Syndrome Years after Mild Traumatic Brain Injury – Randomized Prospective Trial. PLoS One. 2013.
  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0079995

• Gottfried I et al. Hyperbaric Oxygen Treatment—From Mechanisms to Clinical Applications. Biomolecules. 2021.
  https://www.mdpi.com/2218-273X/11/10/1520

Oxygen is essential for mitochondrial ATP production – the core process of cellular energy generation. Changes in oxygen tension can trigger signalling pathways involved in metabolism, vascular growth, and cell survival. 

How this might help

Repeated, controlled hyperoxic exposures (as used in HBOT protocols) have been proposed to activate cellular responses typically associated with hypoxia – a phenomenon known as the “hyperoxic-hypoxic paradox”. This may support mitochondrial function, angiogenesis, and tissue repair in appropriate clinical contexts. 

Selected Research Studies

• Hadanny A, Efrati S. The Hyperoxic-Hypoxic Paradox. Biomolecules. 2020.
  https://pubmed.ncbi.nlm.nih.gov/32630465/

• De Wolde SD et al. The Effects of Hyperbaric Oxygenation on Oxidative Stress, Inflammation and Angiogenesis. Biomolecules. 2021.
  https://pubmed.ncbi.nlm.nih.gov/34439876/

Oxygen plays a key role in immune cell function, tissue repair, and vascular health. Human studies have shown that HBOT can alter markers of oxidative stress, inflammation, and angiogenesis, which are all closely linked to immune and systemic responses. 

How this might help

By optimising oxygen delivery and influencing inflammatory and vascular markers, HBOT may support the body’s broader recovery and resilience when used as part of an integrated care plan under medical supervision. 

Selected Research Studies

• De Wolde SD et al. The Effects of Hyperbaric Oxygenation on Oxidative Stress, Inflammation and Angiogenesis. Biomolecules. 2021.
  https://pubmed.ncbi.nlm.nih.gov/34439876/

• Moon RE (ed.). Hyperbaric Oxygen Therapy Indications. Undersea and Hyperbaric Medical Society reference text summarising accepted indications and mechanisms. (Overview PDF, includes immune and vascular discussions.)
  https://www.uhms.org/images/UHMS-Reference-Material.pdf