Hyperbaric Oxygen Therapy:
Pressure, Oxygen, and the Dose That Matters.

Oxygen is the most important molecule you consume, and you only ever get as much as your blood can carry. Hyperbaric Oxygen Therapy changes that ceiling. Increase the pressure around the body, increase the oxygen you breathe, and the physics of gas solubility does the rest. The result is a measurable oxygen surplus in tissue that ordinary breathing cannot create.

This is the science behind the chamber at BIOGENEX, how we choose between 1.5, 1.8 and 2.0 atmospheres absolute (ATA), why we add oxygen by nasal cannula, and why we built our lab with NEO Science.

The Physics: Henry's Law Inside Your Bloodstream

At sea level you live at 1.0 ATA. Almost all of the oxygen in your blood rides on hemoglobin, and in a healthy person hemoglobin is already about 97 to 98 percent saturated. Breathing harder does not add much. The variable that can move is the oxygen dissolved directly in plasma, and that is governed by Henry's law: the amount of gas dissolved in a liquid rises in proportion to the partial pressure of that gas above it.

Each additional atmosphere of pressure, and each increase in the fraction of oxygen you breathe, raises oxygen partial pressure in the lungs. Plasma carries roughly 0.003 mL of oxygen per deciliter for every mmHg of oxygen partial pressure. Small on paper. Multiplied by the pressures inside a chamber, it becomes oxygen that diffuses farther from capillaries and reaches tissue that hemoglobin-bound oxygen struggles to serve: recovering muscle, connective tissue with poor blood supply, and areas of inflammation.

What the Oxygen Surplus Does

The benefit goes beyond more oxygen. Intermittent hyperoxia acts as a signal. The research on Hyperbaric Oxygen Therapy points to several mechanisms:

• Controlled oxidative signaling. A brief rise in reactive oxygen and nitrogen species acts as a messenger that drives repair, angiogenesis and anti-inflammatory responses. Thom's review in the Journal of Applied Physiology describes this signaling as fundamental to how the therapy works.
• Stem and progenitor cell mobilization. In humans, a single 2-hour exposure at 2.0 ATA doubled circulating CD34+ progenitor cells, and a 20-session course increased them about eightfold through a nitric oxide dependent mechanism.
• The hyperoxic-hypoxic paradox. Repeated cycles of high oxygen followed by return to normal air appear to trigger some of the same regenerative pathways the body activates during low oxygen, including HIF-1 signaling, without the harm of true hypoxia.
• Aging biology. In 35 healthy adults over 64, 60 sessions increased telomere length in several immune cell types by more than 20 percent and reduced senescent T-cell populations. In a randomized controlled trial of 63 healthy older adults, a three-month course improved attention, processing speed and executive function, with measurable gains in cerebral blood flow.

An honest reading matters here. Those aging and cognition trials ran at 2.0 ATA with 100 percent oxygen delivered by mask in a hospital hyperbaric program. A wellness chamber with nasal-cannula oxygen produces a smaller oxygen exposure. BIOGENEX uses these studies to understand mechanism and direction, and does not claim identical results.

1.5, 1.8 and 2.0 ATA: Targeted, Not Default

Most mild chambers run one pressure for everyone. BIOGENEX treats pressure like any other dose. It is selected for the goal, the person, and how well they equalize, then progressed.

Why We Add 4 L/min of Oxygen by Nasal Cannula

Pressure without added oxygen still raises oxygen partial pressure, because the air you breathe is about 21 percent oxygen at every pressure. Adding concentrated oxygen by nasal cannula raises the oxygen fraction you inhale as well. A common clinical estimate is that each liter per minute adds roughly 3 to 4 percentage points, which puts 4 L/min in the range of 33 to 37 percent inspired oxygen. The two effects multiply.

Using the standard alveolar gas equation, here is what that looks like:

The cannula is fed by the chamber's oxygen concentrator, which delivers oxygen at roughly 90 to 95 percent purity. Mixed with the air you breathe around the cannula, that lands in the inspired range shown above. At 2.0 ATA, the cannula takes estimated dissolved plasma oxygen from about 0.8 to about 1.4 mL per deciliter, close to five times the sea-level value. Delivering the oxygen through a cannula rather than flooding the chamber keeps the chamber atmosphere close to normal air, which is the safer way to add oxygen in an enclosed space. It also lets us adjust oxygen independently of pressure.

Session Length and the Full Course

A single session is a stimulus. The adaptation comes from the course. Sixty minutes at pressure is the standard BIOGENEX session, and 30-minute sessions are used for clients who are new to Hyperbaric Oxygen Therapy or still learning to equalize.

Most people notice better energy and sleep within the first few sessions; others need several weeks. Some clients feel relaxed or tired for one to three hours after early sessions as the body shifts into repair. That usually fades after three to eight sessions, and it is less likely when you arrive hydrated and have eaten a light meal.

Before, During and After a Session

• Before. Hydrate, use the restroom, and wear loose natural-fiber clothing. No alcohol, smoking or strong scents beforehand. Phones and tablets are fine. Lighters, vapes, oil-based creams and sharp objects stay outside.
• Equalizing. Start early and keep going as pressure rises: swallowing, yawning, a gentle Valsalva or Toynbee maneuver, or chewing gum. If the ears will not clear, compression pauses until they do. Forehead or temple pressure usually means dehydration or incomplete equalization.
• During. An interphone connects you to staff outside the chamber for the full session, and the control panel is duplicated inside the chamber.
• After. Decompression is gradual. Rehydrate and give yourself a few minutes before driving or training.

Safety and Who Should Not Use the Chamber

At these pressures the therapy is very well tolerated. The most common issue is ear or sinus pressure during compression, which is why every first session starts low and slow. Oxygen toxicity is rare at or below 2.0 ATA with cannula oxygen.

A BIOGENEX clinician screens every client before the first session. We do not pressurize anyone with an untreated pneumothorax. We also review emphysema, COPD or air trapping, uncontrolled asthma, active colds or sinus infection, eustachian tube dysfunction or recent ear, sinus or eye surgery, uncontrolled seizure disorder, pacemakers and implanted devices, high fever, pregnancy, severe claustrophobia, and medications that raise oxygen sensitivity, including bleomycin, doxorubicin, cisplatin and disulfiram.

Why BIOGENEX Partnered With NEO Science

We evaluated chambers the same way we evaluate a lab panel: build quality, control, serviceability, and whether the device lets us run a precise protocol every time.

• Built by operators. NEO Science was founded in Los Angeles by Robin Kuehne, who brought one of the first cryotherapy chambers to the United States in 2008 and ran a recovery clinic before building equipment. The company designs for clinics that run sessions all day.
• Engineered chamber. The NEO O2 Duo 2 chamber, with selectable 1.5, 1.8 and 2.0 ATA settings and an integrated control system that combines compression, oxygen concentration and climate control, touchscreen preset modes, and quiet operation.
• Dedicated oxygen supply. Built-in oxygen concentration lets us run the nasal-cannula protocol at a controlled flow, up to 4 L/min, on every session.
• Trained to protocol. NEO Science trains our staff on screening, equalization coaching, session protocols and maintenance, and supports the clinic through a dedicated lead technician line.
• One partner across the lab. Our chamber, NEO Light and NEO Luna come from one manufacturer, with one support line and U.S. service technicians, which keeps the entire lab running.
• Service record. NEO Science has received the recovery industry's Best Customer Service Award two years running.

How It Fits the BIOGENEX Protocol

Hyperbaric Oxygen Therapy at BIOGENEX is sequenced inside your plan, not booked at random. Pressure and frequency are matched to training load, recovery needs and goals, then paired with photobiomodulation, cold and heat where they add value. When we stack, Hyperbaric Oxygen Therapy comes before the NEO Light bed: the oxygen surplus supplies the raw material, and the light acts on the mitochondria that use it. Members on the APEX Lab plans use their credits for sessions; new Lab members can start with the free two-week trial.