L'oxygénothérapie hyperbare consiste à respirer de l'oxygène dans un caisson pressurisé bien au-dessus de la normale, de sorte que le sang en transporte bien plus qu'à l'ordinaire. Pour un ensemble défini d'indications, c'est une médecine efficace. C'est le traitement de référence de l'accident de décompression et de l'intoxication grave au monoxyde de carbone. Elle accélère la cicatrisation des ulcères tenaces du pied diabétique, des tissus endommagés par la radiothérapie et de la surdité brusque prise en charge tôt.
Autour de ce noyau, un vaste marché du bien-être la vend pour le vieillissement, le cerveau et la récupération. Ces allégations reposent sur de petites études, souvent menées dans des caissons souples à basse pression qui délivrent moins d'oxygène. La recherche indépendante n'a pas encore confirmé de bénéfice pour ces usages bien-être.
Findings & Outcomes
What It Is
Inside a sealed hyperbaric chamber the pressure runs to roughly two to three times normal atmospheric pressure. At that pressure far more oxygen than usual reaches tissue that was starved of it. A full course is many sessions, often forty, each about ninety minutes. Two very different uses share the one name. One is a defined set of approved medical conditions treated in hospitals. The other is a much larger wellness market where the evidence is thinner or the equipment weaker.
Anatomy of the Practice
1Under pressure
In the pressurized chamber, high-concentration oxygen reaches tissue that a poor blood supply or low red-cell delivery would otherwise leave starved.
2In starved tissue
The extra oxygen reaches wounds, infected tissue, and radiation-damaged areas that were short of it. Over a course of sessions this is where its healing effects take hold.
3Over a course
A single visit does little; the wound-healing and tissue effects build over a course of weeks. The wellness market applies the same long, repeated dosing to claims the evidence does not yet support.
What It Does
The approved uses rest on controlled trials and long practice:
- In serious carbon monoxide poisoning, a double-blind trial gave three hyperbaric sessions. Lasting thinking problems at six weeks fell from 46% to 25%, and the gap was still present a year later.
- For stubborn diabetic foot ulcers, adding hyperbaric oxygen to standard wound care roughly doubled the share that fully healed within a year, 52% against 29%.
- Recompression with oxygen has long been the standard of care for decompression illness in divers.
- For tissue damaged by earlier radiation treatment, it improves healing and resolution, most clearly in the head, neck, jaw, bladder, and rectum.
- Given early after sudden unexplained hearing loss, it raises the chance of some hearing recovery; started after six months, it does not help.
The wellness claims are weaker. In a controlled trial of 63 healthy older adults, hyperbaric oxygen improved attention and processing speed. The trial was better designed than most wellness studies here. It used an untreated control instead of a sham, and it stands alone. The bigger claims (aging, the brain, long COVID, fibromyalgia, recovery) are weaker still. In autism, where families meet aggressive marketing, the pooled studies are weak and inconsistent. The stronger blinded trials show no clear effect, so the question is unsettled. These wellness lines come largely from one research group, in conditions strongly shaped by expectation. They are preliminary signals. They need independent replication before they can be called established. They are also genuinely interesting: early hints that could become real protocols if independent trials confirm them.
Medical hyperbaric oxygen means 100% oxygen at high pressure in a hospital-grade chamber. Much of what is sold for wellness is a soft chamber, pressurized only slightly above ambient and often filled with ordinary air or a modest oxygen boost. It is a different intervention that delivers far less oxygen.
The Research & Studies
Everything here is based on the research we have collected and checked, sorted into groups and ordered with the strongest evidence first. Click any claim to open the studies behind it.
Cognition
After carbon monoxide poisoning, lasting thinking problems at six weeks fell from 46% to 25%
People treated with three hyperbaric oxygen sessions after carbon monoxide poisoning were about half as likely to have lasting memory and thinking problems at six weeks, 25% against 46%, and the difference held a year later.
In a double-blind randomized trial of adults with acute carbon monoxide poisoning, three hyperbaric oxygen treatments within 24 hours reduced cognitive sequelae at six weeks to 19 of 76 (25.0%) versus 35 of 76 (46.1%) in the sham arm, P=0.007, an adjusted odds ratio of 0.45 (95% CI 0.22 to 0.92). The benefit persisted at 12 months (P=0.04). This is the trial that anchors CO poisoning as an approved indication, though other trials have been less clear-cut and the ideal number and timing of sessions is still argued.
This is an emergency treatment given in hospital soon after a serious exposure, not something a person arranges for themselves. The practical point for a reader is that a suspected significant CO exposure is a reason to get to emergency care quickly, where hyperbaric oxygen is one of the tools available.
The study · 1
Weaver et al., hyperbaric oxygen for acute carbon monoxide poisoning · N Engl J Med 2002;347(14):1057-67
In one trial of 63 healthy older adults, attention and processing speed improved
In healthy older adults, a long course of hyperbaric oxygen improved attention and mental processing speed compared with an untreated group, and brain blood flow rose.
In a randomized controlled trial, 63 healthy adults over 64 (33 treated, 30 controls) received 60 sessions over 90 days. The treated group showed a significant group-by-time improvement in global cognitive function, with net effect sizes of 0.745 for attention and 0.788 for information processing speed, and increased cerebral blood flow in frontal and parietal regions. It is a controlled trial, which lifts this above the uncontrolled aging work, but it is one study in a specific population, its control group was untreated instead of sham, and durability and everyday meaning are not yet established.
Read this as an early controlled signal in healthy aging, not a settled reason to undertake a costly 60-session course. A single trial with an untreated, not sham control needs replication before it guides a decision.
The study · 1
Hadanny et al., cognitive enhancement of healthy older adults using hyperbaric oxygen · Aging (Albany NY) 2020;12(13):13740-13761
Skin And Hair
Hyperbaric oxygen healed 52% of stubborn diabetic foot ulcers within a year, against 29% on standard care
Adding hyperbaric oxygen to standard wound care roughly doubled the share of stubborn diabetic foot ulcers that fully healed within a year, 52% against 29%.
In a randomized, double-blinded, placebo-controlled trial of 94 patients with diabetes and chronic foot ulcers, 40 sessions over eight weeks produced complete healing at one year in 25 of 48 (52%) with hyperbaric oxygen versus 12 of 42 (29%) with sham air (P=0.03). Among patients completing more than 35 sessions the difference widened to 23 of 38 (61%) versus 10 of 37 (27%), P=0.009. The effect depends on finishing a demanding course of treatment, and it applies to selected patients with wounds that have resisted standard care, not to diabetic ulcers in general.
This is an adjunct to good wound care, blood-sugar control, and vascular assessment, and it works alongside them. Raise it with a wound-care team for an ulcer that is not healing despite proper standard treatment, and keep in mind that the benefit came from completing the full course.
The study · 1
Löndahl et al., hyperbaric oxygen therapy facilitates healing of chronic foot ulcers in patients with diabetes · Diabetes Care 2010;33(5):998-1003
Faster short-term ulcer healing, but no reduction in major amputations
Across the randomized trials, hyperbaric oxygen helped diabetic foot ulcers heal faster in the short term, but did not clearly lower the chance of losing a limb.
A Cochrane review included 12 randomized trials (577 participants). A pooled analysis of 5 trials (205 participants) found hyperbaric oxygen improved healing of diabetic foot ulcers at six weeks (RR 2.35, 95% CI 1.19 to 4.62) but not at one year, and a pooling of 5 trials (312 participants) found no statistically significant reduction in major amputation (RR 0.36, 95% CI 0.11 to 1.18). The reviewers rated the trials as often small and at risk of bias and called for higher-quality studies. So the short-term healing signal holds while the limb-salvage claim, which is what patients care about most, is not established.
The realistic expectation to set is faster healing of a selected ulcer, not a demonstrated reduction in amputations. That distinction matters when weighing a demanding course of treatment.
The study · 1
Kranke et al., hyperbaric oxygen therapy for chronic wounds · Cochrane Database Syst Rev 2015
Hyperbaric oxygen improved healing of radiation-damaged tissue (risk ratio 1.39)
For tissue damaged by earlier radiation treatment, hyperbaric oxygen made healing and resolution more likely, especially for the head and neck, jaw, bladder and rectum.
A Cochrane review of 18 randomized trials (1,071 participants) found hyperbaric oxygen improved complete resolution or significant improvement of late radiation tissue injury (RR 1.39, 95% CI 1.02 to 1.89) and reduced wound dehiscence after operations in irradiated tissue (RR 0.24, 95% CI 0.06 to 0.94), with moderate-certainty evidence for pain improvement in mandibular osteoradionecrosis at 12 months. Benefits were seen for head, neck, bladder and rectal tissue. The same review recorded harms: a higher risk of reduced visual acuity (RR 4.03) and of ear barotrauma, and it called for more rigorous trials.
This is one of the better-supported approved uses, delivered through a hospital hyperbaric unit for radiation damage that is not settling on its own. The benefit is weighed against a real course cost and the ocular and ear risks the same evidence documents.
The study · 1
Lin et al., hyperbaric oxygen therapy for late radiation tissue injury · Cochrane Database Syst Rev 2023
How it works
Recompression with oxygen is the established treatment for decompression illness in divers
Putting a diver with the bends back under pressure with oxygen is the established treatment. The randomized trials that exist tested add-ons to that treatment, not the treatment itself.
Recompression in a hyperbaric chamber breathing oxygen is the accepted standard of care for decompression illness and arterial gas embolism, resting on physiology and long clinical experience, not placebo-controlled trials, since withholding recompression to form a control group would be unethical. A Cochrane review found only 2 randomized trials (268 patients), both of adjuncts: adding a non-steroidal anti-inflammatory did not improve the odds of recovery (RR 1.04, 95% CI 0.90 to 1.20), while a heliox table reduced the odds of needing multiple recompressions. So the core treatment is well established while the formal randomized base is thin and concerns refinements.
For anyone who dives, the practical point is that decompression illness is a medical emergency treated by recompression, and that the surface first aid is high-flow oxygen while arranging transfer to a chamber.
The study · 1
Bennett et al., recompression and adjunctive therapy for decompression illness · Cochrane Database Syst Rev 2012
Vision
La vision dérive d'environ 0.58 à 0.61 dioptrie vers plus de myopie au cours d'une cure, s'inversant généralement par la suite
Une cure d'oxygénothérapie hyperbare rend souvent la vision légèrement plus myope, d'un faible degré qui augmente au fil des séances et qui s'inverse généralement après la fin du traitement.
Dans une série de 44 yeux de patients diabétiques suivis sur 30 séances de traitement, l'oxygénothérapie hyperbare a produit un léger déplacement myopique, statistiquement significatif d'environ 0.58 à 0.61 dioptrie, apparu dès la première séance et corrélé au nombre de séances. Les modifications du cristallin induites par l'oxygène sont un effet reconnu des traitements hyperbares répétés et s'inversent généralement en quelques semaines après la fin d'une cure, bien que des cures intensives plus longues aient également été associées à une progression de la cataracte. C'est un effet secondaire gênant, non dangereux, mais il explique pourquoi la vision peut se troubler pendant une cure.
En pratique, il faut s'attendre à un certain flou temporaire pendant une cure longue et attendre que la vision se stabilise pendant plusieurs semaines après la fin du traitement avant de mettre à jour une prescription de lunettes.
The study · 1
Andrawus-Haddad et al., the rate of development of myopia during hyperbaric oxygen therapy · Harefuah 2010
Hearing And Tinnitus
Started early, hyperbaric oxygen raised the chance of hearing recovery about 22%; after six months it did not help
Given soon after sudden unexplained hearing loss, hyperbaric oxygen raised the chance of some hearing recovery, with a threshold gain around 15 decibels. Starting late, after months, did not help.
A Cochrane review of 7 randomized trials (392 participants) found that for acute idiopathic sudden sensorineural hearing loss, hyperbaric oxygen produced a 22% greater chance of improvement (NNT 5) and a mean 15.6 dB greater improvement in hearing threshold. There was no significant benefit for chronic presentations treated after six months. The reviewers judged the clinical significance uncertain and the trials small, so this sits as an emerging use, not a settled one, and timing appears to matter.
Because the signal is tied to early treatment, speed matters: sudden unexplained hearing loss is a same-week medical matter, and hyperbaric oxygen is one option a specialist may add early, not months later.
The study · 1
Bennett et al., hyperbaric oxygen for idiopathic sudden sensorineural hearing loss and tinnitus · Cochrane Database Syst Rev 2012
Pain
In an open-label trial of 60 women, hyperbaric oxygen eased fibromyalgia pain
In a crossover trial of women with fibromyalgia, a course of hyperbaric oxygen eased pain and improved quality of life, alongside shifts in brain-imaging patterns.
Dans un essai croisé prospectif, 60 femmes atteintes de fibromyalgie (âgées de 21 à 67 ans) ont reçu 40 séances à 100 % d'oxygène. Le groupe traité immédiatement et le groupe croisé ont tous deux montré une amélioration significative des symptômes de fibromyalgie et de la qualité de vie, avec des changements correspondants de l'activité cérébrale à l'imagerie SPECT. Le plan croisé renforce ces résultats, mais l'essai n'était pas en aveugle, n'a étudié que des femmes, et une pathologie qui répond fortement à l'attente rend un résultat en ouvert difficile à distinguer d'un effet placebo. Cela signale que la fibromyalgie est une utilisation émergente à surveiller, pas un traitement établi.
Who this may not transfer to:Measured only in women. Fibromyalgia is far more often diagnosed in women, and this trial enrolled none, so the size of any effect in men is unknown, not assumed to be similar.
La position raisonnable est un intérêt tempéré par le plan d'étude : un résultat en ouvert dans une pathologie très sensible à l'attente ne constitue pas encore une base pour s'engager dans un traitement coûteux. C'est un candidat pour un essai correctement en aveugle.
The study · 1
Efrati et al., hyperbaric oxygen therapy can diminish fibromyalgia syndrome, prospective clinical trial · PLoS One 2015;10(5):e0127012
Energy And Fatigue
Dans le COVID long, les bénéfices sur le sommeil et la douleur d'un essai contrôlé par simulacre ont persisté au-delà d'un an dans un suivi non contrôlé de 31 patients
Dans un essai randomisé sur le COVID long, une cure d'oxygénothérapie hyperbare a amélioré la qualité de vie, le sommeil et la douleur, et un suivi a montré que les bénéfices étaient toujours présents plus d'un an plus tard.
Un essai randomisé contrôlé par simulacre a donné 40 séances à des patients atteints de COVID long et a constaté un bénéfice à court terme ; ce suivi longitudinal a ensuite réévalué 31 des patients traités environ 486 jours après la dernière séance. Par rapport à la valeur de référence, les améliorations de la qualité de vie, du sommeil (tailles d'effet de 0.47 à 0.79), de l'intensité de la douleur (0.69) et de son interférence (0.83), ainsi que des symptômes neuropsychiatriques, ont persisté au-delà d'un an. Le bras simulacre était passé à l'oxygénothérapie hyperbare et n'a pas été suivi à long terme, donc la persistance repose sur une comparaison intra-groupe non contrôlée, et non contrôlée. Les échantillons sont petits, le travail provient en grande partie d'un seul groupe, et le COVID long s'améliore de lui-même avec le temps, donc il s'agit d'une utilisation émergente qui nécessite une réplication par des équipes indépendantes.
Pour le COVID long, la lecture mesurée est un optimisme prudent : un petit essai contrôlé par simulacre avec des bénéfices durables, c'est plus que ce que la plupart des traitements proposés ont montré, mais cela reste une seule ligne de preuve d'un seul groupe, pas encore une raison d'attendre le même résultat pour tout le monde.
The study · 1
Hadanny et al., long term outcomes of hyperbaric oxygen therapy in post covid condition · Sci Rep 2024
Longevity And Mortality
In 35 older adults with no control group, immune-cell telomeres lengthened over 20%
In a small study of older adults with no comparison group, a long course of hyperbaric oxygen was followed by longer telomeres in immune cells and fewer worn-out cells, which is the finding behind the reverse-aging headlines.
In a prospective trial, 35 healthy adults aged 64 and over completed 60 hyperbaric sessions over 90 days. Telomeres of T-helper, T-cytotoxic, natural killer and B cells lengthened by more than 20% (B-cell telomeres by 37.63% after treatment), and senescent T-helper cells fell by 37.30%. The result is striking and it is the origin of the anti-aging claims, but the design allows only a limited conclusion: 35 people, no control group, blood-cell markers, not health outcomes, and a research team with a commercial interest in the therapy. Whether longer telomeres in circulating immune cells translate into living longer or better is a further question this study does not answer.
The useful reading is to treat this as an early mechanistic signal worth watching, not a reason to buy a course of treatment. Marker changes in blood cells are a long way from a demonstrated effect on how long or how well a person lives.
The study · 1
Hachmo et al., hyperbaric oxygen therapy increases telomere length and decreases immunosenescence in isolated blood cells · Aging (Albany NY) 2020;12(22):22445-22456
Neurodevelopmental
Des études groupées faibles suggéraient un bénéfice pour l'autisme, mais des essais en aveugle rigoureux ne montrent aucun effet clair
Une analyse groupée de petites études a rapporté des améliorations des symptômes de l'autisme avec l'oxygénothérapie hyperbare, mais les études étaient faibles et incohérentes, et les essais contrôlés par simulacre les plus rigoureux n'ont pas trouvé d'effet clair.
Une revue systématique et méta-analyse de 2025 a regroupé 17 études (890 enfants et adolescents) et a rapporté des améliorations modérées à importantes des symptômes centraux de l'autisme (DMS -0.66), de la communication (-0.88), de la conscience cognitive (-0.93) et du comportement (-0.80). Les auteurs de la revue ont eux-mêmes signalé la faible qualité des études, leur hétérogénéité, et la nécessité d'essais de haute qualité avant que l'efficacité puisse être confirmée. Regrouper des études faibles et mixtes peut générer un chiffre positif que des plans plus solides, en aveugle, ne reproduisent pas, c'est pourquoi la direction ici est laissée ouverte, et non qualifiée de bénéfice. Les familles font face à un marketing agressif de cette utilisation, donc l'écart entre le marketing et les preuves compte.
Le conseil pratique pour une famille est la retenue : le marketing dépasse largement les preuves, les essais bien contrôlés n'ont pas montré d'effet clair, et le coût et le temps sont considérables, donc ce n'est pas une utilisation à poursuivre sur la seule force des allégations qui l'accompagnent.
The study · 1
Tu et al., the effectiveness of hyperbaric oxygen therapy in children and adolescents with autism spectrum disorders, systematic review and meta-analysis · Prog Neuropsychopharmacol Biol Psychiatry 2025
How It Works
Oxygen normally travels bound to hemoglobin in the red cells, which sit nearly full at sea level, so breathing extra oxygen at normal pressure adds little. Raise the pressure and a large quantity dissolves directly into the plasma, several times the usual amount. That plasma-borne oxygen diffuses into tissue the red cells reach poorly.
The strongest uses are all cases of oxygen starvation: a wound that will not heal, radiation-scarred tissue, an infection in poorly perfused tissue, or blood loaded with carbon monoxide.
Repeated sessions do four things:
- promote new blood-vessel growth into damaged areas
- help certain white cells make the reactive molecules they use to kill bacteria
- reduce tissue swelling by constricting overdilated vessels
- in carbon monoxide poisoning, speed the gas out of the blood and limit the inflammatory injury that follows
Like heat and cold exposure, this is a controlled, repeated stress, the idea behind hormesis. Much of its action turns on the mitochondria and the vessel wall. For the approved uses the mechanism is well understood.
Getting It Right
Delivered under medical supervision, hyperbaric oxygen is prescribed, not self-administered. The decision that matters is whether a given use is on the approved list or one of the wellness claims.
Ways to Do It
The moves below sort where a given claim sits in the evidence.
The approved list is specific: decompression illness, carbon monoxide poisoning, gas embolism, non-healing diabetic foot ulcers, radiation tissue injury, sudden hearing loss caught early, and certain severe infections. Anti-aging, general brain-boosting, and sports recovery are not on it. A claim on the approved list carries the weight of controlled trials and long practice; a claim off it does not.
For a condition on the approved list, hyperbaric oxygen is delivered through a hyperbaric unit on referral from a clinician, as a course of many sessions. It is an adjunct to good standard care and works alongside it. It is generally most useful when standard treatment alone has not resolved the problem.
For a serious problem, hyperbaric oxygen belongs alongside standard treatment, with a clinician overseeing the case. It is an addition to proven care, not a replacement for it.
Go Deeper
- Hormesis: how a controlled, repeated stress leaves tissue sturdier.
- Heat exposure: the sauna evidence for blood vessels and blood pressure.
- Cold exposure: what cold does, and how it is often paired with heat.
The Chinese Medicine View
Hyperbaric oxygen is a modern hospital technology, so no classical Chinese medicine teaching addresses it.
The tradition does hold a related idea. The Lung draws in Da Qi, the clear Qi of air. That clear Qi combines with the essence the Spleen extracts to form the body Qi, the vitality that moves and defends the body.
High-pressure oxygen can be mapped onto that idea, and some wellness marketing frames the chamber as filling the body with clear Qi. But Qi is a functional idea: transformation, movement, and defense across the whole body. The two accounts share only a loose idea: that breath brings in something the body needs. The mapping is an interpretation only.
Cautions For This Practice
Everything to be aware of is here, in one place. This practice suits most healthy people; a few situations call for real care.
Le barotraumatisme de l'oreille, l'effet secondaire le plus courant, touche environ 15 % des patients
Une revue systématique de 2025 sur les événements indésirables otologiques a constaté qu'environ 15 % des 18,284 patients traités par oxygénothérapie hyperbare ont présenté un événement indésirable lié à l'oreille, principalement un barotraumatisme de l'oreille moyenne ; parmi ceux-ci, 42.8 % étaient légers et 6.4 % sévères. Le risque était plus élevé avec l'âge avancé, le sexe féminin, une pathologie de la tête et du cou, une neuropathie sensorielle et une difficulté préexistante à équilibrer la pression auriculaire. Une technique d'équilibrage efficace était le principal facteur protecteur. La plupart des cas sont mineurs et gérables, et ce schéma indique qui a besoin de soins et d'un enseignement supplémentaires avant le traitement.Voigt et al., systematic review of otologic adverse events in hyperbaric oxygen therapy
Les crises convulsives liées à la toxicité de l'oxygène sont rares, environ 1 séance sur 2,000, et ne laissent aucun dommage durable
Dans une série rétrospective monocentrique de 10,425 séances de traitement chez 1,308 patients, cinq crises convulsives liées à la toxicité du système nerveux central à l'oxygène sont survenues, soit un taux global de 0.048 % des séances. Le taux était plus élevé dans l'intoxication au monoxyde de carbone (0.148 %) et nettement plus élevé dans l'embolie gazeuse artérielle (3,448 %). Aucune crise n'a causé d'effets durables. Ces événements sont rares et se résolvent d'eux-mêmes une fois l'oxygène retiré, et les unités gèrent le risque par des pauses d'air et des limites de pression. Le taux plus élevé dans certaines indications d'urgence reflète à la fois les patients et les protocoles plus agressifs utilisés pour eux.Lee et al., seizure during hyperbaric oxygen therapy, experience at a single academic hospital in Korea
Ear And Sinus Barotrauma Is The Common Side Effect
The pressure change can injure the middle ear, the most frequent complication, affecting about one in seven patients, and usually mild. Older age, prior ear trouble, and difficulty equalizing raise the risk. Learning ear-clearing techniques, slower compression, and treating congestion beforehand reduce it. Sinus and, rarely, lung barotrauma can also occur.
Oxygen Toxicity Can Rarely Trigger A Seizure
Breathing oxygen at high pressure can rarely cause a central nervous system oxygen toxicity seizure. It is uncommon, on the order of one in a couple of thousand sessions in general use, and higher in carbon monoxide and gas embolism cases. It resolves once oxygen is removed, with no lasting harm. Units manage it with scheduled air breaks and pressure limits.
Contraindications And Who Needs Extra Care
An untreated pneumothorax, a collapsed lung, is the clearest reason to avoid a chamber, because trapped air expands as pressure changes. Certain lung diseases, some chemotherapy drugs, recent ear or chest surgery, uncontrolled high fever, and claustrophobia all call for medical assessment first. Vision can shift slightly toward short-sightedness during a long course and usually settles within weeks after it ends, so hold off on updating a glasses prescription until then.
A Full Course Takes Weeks, And Fire Is A Managed Hazard
The course runs to many sessions over weeks, a large commitment of time. Because the chamber is oxygen-rich, fire is a serious hazard, so units forbid certain materials and devices inside.
The Wellness Claims Are Not A Reason To Delay Proven Care
The anti-aging, cognitive, long COVID, fibromyalgia, and autism uses rest on small or uncontrolled studies, and often on soft chambers that differ from the medical version. The real risk is choosing an unconfirmed course instead of care proven for the same problem. Treat these as areas still being tested, and keep any serious condition under a doctor's care.
Start slow, be smart, read the research, and consult a professional if you have any concerns. This is here to inform your choice, not make it for you.
Common Questions
Does Hyperbaric Oxygen Reverse Aging?
The widely shared study lengthened telomeres by more than 20% and cut the load of worn-out cells in the blood of 35 healthy older adults. It had no comparison group. It measured cell markers in the blood, and nothing a person would actually feel, such as living longer or better. So it is a suggestive laboratory result, far from evidence that the therapy slows aging.
Does It Help Long COVID Or Fibromyalgia?
In long COVID, a small sham-controlled trial found short-term gains in quality of life, sleep, and pain. A later follow-up re-examined only the treated patients, without a control group, and reported their gains still present more than a year on. In fibromyalgia, an open-label crossover trial in women eased pain and improved quality of life. Both come from small samples, so read them as early and unconfirmed.
Does It Prevent Amputations In Diabetic Foot Disease?
It speeds the short-term healing of selected diabetic foot ulcers. Pooled across the randomized trials, though, it did not significantly lower the rate of major amputation, the outcome patients care about most.
So it can help a wound close faster without changing whether a limb is ultimately lost.
Explore Related
Other pages this one connects to, by the evidence they share, the outcomes they touch, and the ground they cover.
All 14 sources on this page independently checked and cross-referenced.
Thomas Dehli, Founder & Editor, Sacred Lotus
Sacred Lotus has published Chinese medicine reference material since 2001. Integrative pages are held to the same standard as the herb and formula library: cite the source, grade the claim at its real strength, and say where the research has not looked. This page is educational and it is not medical advice. Last reviewed and updated August 9, 2026.
Evidence strength
How confidently the research supports a claim. Strength describes the evidence, not our endorsement.