There has been a great deal of scientific research conducted into the benefits of Hyperbaric Oxygen Therapy.

Here are links to a few standout published studies

Research done by the NHS into Hyperbaric Oxygen Therapy
https://www.evidence.nhs.uk/search?q=hyperbaric+oxygen

Scientific research done in Israel studying the effects of HbOT on ageing.
https/www.aging-us.com/article/202188/text

Research looking into the effects of HbOT on Sports Injuries
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3382683/

Researching and developing hyperbaric oxygen therapy for skin rejuvenation and treatment of photoaging
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3977684/

A study showing that Hyperbaric Oxygen Therapy  may be a promising alternative treatment for Alzheimer's disease
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7293997/

A study into how hyperbaric oxygen therapy can improve attention, information processing speeds and executive functions which normally decline with ageing.
https://pubmed.ncbi.nlm.nih.gov/32589613/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5851727/