What is Hyperbaric Oxygen Therapy?

Hyperbaric Oxygen Therapy (HBOT) involves breathing 100% pure oxygen in a sealed chamber pressurized to 1.5–3.0 times normal atmospheric pressure. This dramatically increases the amount of oxygen dissolved directly into your blood plasma, allowing it to reach tissues that normal red blood cell delivery cannot. It was first developed in the 1930s for deep-sea diving decompression sickness and has since grown into a recognized medical treatment for over a dozen FDA-cleared conditions.

How does Hyperbaric Oxygen Therapy work?

Under elevated pressure, oxygen dissolves into blood plasma at levels 10–15 times higher than normal breathing, flooding oxygen-starved or damaged tissues. This hyperoxic environment stimulates the growth of new blood vessels, enhances white blood cell activity to fight infection, reduces dangerous swelling in brain and injured tissue, and triggers stem cell release from bone marrow. It also creates a hostile environment for certain anaerobic bacteria that cannot survive in high-oxygen conditions.

What forms does Hyperbaric Oxygen Therapy come in?

Hospital-grade hard-shell monoplace or multiplace chambers deliver the highest therapeutic pressures (2.0–3.0 ATA) and are used for serious medical conditions. Soft-shell mild hyperbaric chambers operate at 1.3 ATA and are available for home or wellness use, offering gentler benefits with a lower risk profile. For FDA-cleared indications, only hard-shell medical chambers are used clinically.

Where it comes from:

The first hyperbaric chamber for medical use was built in the 1660s by British physician Nathaniel Henshaw. Modern HBOT developed rapidly after the 1930s when it was used to treat decompression sickness in divers. By the 1960s, it was being explored for carbon monoxide poisoning and wound healing. Today the Undersea and Hyperbaric Medical Society (UHMS) recognizes 14 FDA-cleared indications, and research into neurological, cognitive, and longevity applications is actively expanding.

What does Hyperbaric Oxygen Therapy help with?

• Non-healing wounds and diabetic foot ulcers: When wounds stall because of poor circulation or diabetes, tissues starve for oxygen and healing stops. HBOT floods those tissues with high-dose oxygen, kick-starts new blood vessel growth, and restores the body's ability to fight infection — giving stuck wounds the push they need to finally close.
• Carbon monoxide poisoning: Carbon monoxide binds to hemoglobin hundreds of times more tightly than oxygen, blocking your blood's ability to carry oxygen to the brain and heart. Breathing pure oxygen at high pressure rapidly displaces the carbon monoxide and restores normal oxygen delivery, dramatically cutting the risk of long-term brain damage.
• Decompression sickness (diving injuries): When divers surface too quickly, nitrogen bubbles form in the blood and tissues causing pain, paralysis, and organ damage. HBOT is the gold-standard emergency treatment — the pressure physically shrinks the bubbles while high oxygen flushes nitrogen out of the body.
• Brain fog and cognitive decline: HBOT appears to increase blood flow and oxygen delivery to areas of the brain that have become sluggish due to aging, injury, or chronic illness. Research shows improvements in memory, attention, and processing speed, and brain scans show measurable increases in activity in previously underactive regions.
• Traumatic brain injury (TBI) and concussion: After a brain injury, damaged but still-living tissue can remain in a low-oxygen, dormant state for months or years. HBOT can reawaken this tissue by restoring oxygen supply, reducing inflammation, and promoting new blood vessel growth in injured brain areas.
• Post-COVID fatigue and long COVID: Long COVID appears to involve persistent micro-damage to blood vessels and oxygen delivery across multiple organs. Early clinical trials show that HBOT can reduce fatigue, improve brain fog, and restore physical function in long COVID patients, likely by repairing vascular damage and reducing neuroinflammation.
• Radiation tissue damage (after cancer treatment): Radiation therapy can leave behind fragile, oxygen-deprived tissue that breaks down slowly over months or years. HBOT stimulates the regrowth of blood vessels in irradiated tissue and is an FDA-cleared treatment for osteoradionecrosis (radiation damage to bone) and other radiation injuries.
• Bone infections (osteomyelitis): Deep bone infections are notoriously hard to treat because antibiotics struggle to reach oxygen-poor bone tissue and because the bacteria thrive in low-oxygen environments. HBOT boosts oxygen levels deep in bone, directly impairs the bacteria, and makes antibiotics significantly more effective.
• Stroke recovery: In the weeks to years after a stroke, some brain tissue around the damaged area remains alive but barely functioning. HBOT can help restore activity in this vulnerable tissue by improving oxygenation, reducing swelling, and supporting neuroplasticity, with some studies showing improved motor and cognitive function even in chronic stroke.
• PTSD and mental health support: Emerging research suggests HBOT may reduce PTSD symptoms by improving blood flow and metabolic activity in brain regions involved in emotional regulation and memory processing. Though still early stage, results from veteran populations have been encouraging.

What can Hyperbaric Oxygen Therapy help prevent?

• Amputation in diabetic foot ulcer patients (when used as adjunct to standard care)
• Long-term neurological damage from carbon monoxide poisoning
• Permanent disability from severe decompression sickness when treated promptly

Which foods are rich in Hyperbaric Oxygen Therapy?

HBOT is a chamber-based medical therapy, not a nutrient found in food. However, your diet can significantly affect how well your body responds to it. Foods rich in antioxidants (berries, leafy greens, colorful vegetables) help protect tissues from the oxidative stress that high-dose oxygen can produce. Nitrate-rich foods like beets, arugula, and spinach support nitric oxide production and blood vessel dilation, complementing HBOT's goal of improving tissue oxygenation. Adequate protein intake from fish, legumes, eggs, and lean meats supports the tissue repair and collagen synthesis that HBOT promotes. Anti-inflammatory omega-3 fats from fatty fish, flaxseed, and walnuts help reduce the inflammatory burden HBOT is often used to counter. Avoid alcohol and smoking around sessions, as both impair oxygen delivery and blunt the therapy's benefits.

What are the side effects of Hyperbaric Oxygen Therapy?

• Ear pressure or discomfort (barotrauma): the most common issue, similar to pressure changes when flying
• Sinus pressure or mild pain, especially in people with congestion
• Temporary vision changes (nearsightedness) that typically resolve after completing a course of treatment
• Fatigue or lightheadedness immediately after sessions
• Claustrophobia in monoplace chambers
• Oxygen seizures: very rare, occur at high pressures (above 2.5 ATA) and typically self-resolve immediately
• Pulmonary oxygen toxicity: extremely rare under proper clinical protocols, associated with excessively long sessions at high pressure
• Fire risk: oxygen-rich environments are flammable; certified chambers have strict safety protocols to prevent this

Good to know:

HBOT is very safe when performed in a properly certified medical setting under trained supervision. Most side effects are mild and temporary. Serious complications are rare and almost always linked to improper protocols or contraindicated conditions.

How much Hyperbaric Oxygen Therapy should you take?

• Recommended daily: For FDA-cleared medical indications: 90–120 minutes per session at 2.0–2.5 ATA, 5 days per week, for 20–40 sessions total depending on the condition. For mild/wellness HBOT (soft chambers at 1.3 ATA): 60 minutes per session, frequency varies by protocol. Always prescribed and supervised by a certified hyperbaric physician for medical use.
• Best time of day: Morning or midday sessions are preferred by most clinics as some people feel energized after treatment. Avoid evening sessions if the therapy affects your sleep.
• With or without food: Eat a light meal 1–2 hours before a session. Avoid heavy meals immediately beforehand as pressure changes and lying still can cause discomfort. Stay well hydrated before and after each session.
• Time to effect: Acute emergencies (CO poisoning, decompression sickness): benefit begins within a single session. Wound healing: measurable improvement often within 10–15 sessions. Neurological and cognitive conditions: most protocols are 40 sessions, with improvements often noticed from session 20 onward.
• How long to take it: For medical conditions, standard courses run 20–40 sessions. After completing a course, maintenance sessions (monthly or as needed) are sometimes used for chronic conditions. For wellness applications, shorter courses of 10–20 sessions are common, repeated seasonally or as needed. Do not self-prescribe for medical conditions — always work with a certified hyperbaric medicine provider.