From cold plunges and infrared saunas to red light therapy and wearable technology, biohacking has become a significant part of the conversation around health, recovery and longevity. Yet one of the most fundamental elements of human physiology, oxygen, is often overlooked.
Biohacking is essentially the practice of making intentional changes to lifestyle, environment or physiology to improve how the body and mind function. For some, the focus is energy and cognitive performance. For others, it's better sleep, physical recovery or maintaining good health as they age.
Not all biohacking involves expensive equipment or emerging technology. Morning sunlight, regular exercise, quality sleep, good nutrition and stress management are all examples of practices that influence our physiology. More advanced approaches include infrared saunas, cold immersion, red light therapy, continuous glucose monitoring and hyperbaric oxygen therapy.
With so many options available, it's easy to become focused on the latest technology without fully understanding the biological processes we're trying to influence. Oxygen is central to many of those processes, making controlled changes in oxygen availability an area worth investigating.
Mild hyperbaric oxygen therapy (mHBOT) offers one way to explore this relationship, although understanding its potential also requires recognising the difference between established physiology and demonstrated clinical benefits.
Before We Biohack, What Are We Actually Trying to Improve?
The human body is constantly working to maintain itself. Billions of cells carry out processes involved in energy production, immune function, tissue repair, movement and adaptation every second.
Mitochondria produce much of the energy required for cellular activity, the immune system identifies and responds to threats, and the nervous system continuously processes information. Meanwhile, muscles, connective tissues and organs are maintaining and repairing themselves.
Oxygen is essential to many of these functions, particularly aerobic energy production. Without an adequate supply, cells cannot sustain normal mitochondrial activity, which is why oxygen delivery is so carefully regulated by the respiratory and cardiovascular systems.
However, normal oxygen levels don't automatically mean that increasing oxygen exposure will improve health or performance. In healthy individuals, oxygen delivery is already tightly controlled.
The question being explored in hyperbaric research is whether carefully managed changes in oxygen availability can influence cellular signalling and produce useful physiological responses.
What Makes Mild Hyperbaric Oxygen Therapy Different?
Oxygen enters the lungs and moves into the bloodstream, where it is transported throughout the body in two main ways. Most is carried by haemoglobin within red blood cells, while a much smaller amount dissolves directly into blood plasma.
Hyperbaric exposure changes the amount of oxygen that can dissolve into plasma. By increasing atmospheric pressure, particularly when supplemental oxygen is administered, the partial pressure of oxygen rises, allowing more oxygen to dissolve into the blood. This relationship is explained by Henry's Law, which describes how gas dissolves into a liquid in relation to its partial pressure.
Mild hyperbaric systems commonly operate around 1.3–1.5 atmospheres absolute (ATA), although operating pressures and oxygen delivery vary between systems. The actual oxygen exposure depends on both the chamber pressure and the concentration of oxygen being breathed.
This differs from conventional medical hyperbaric oxygen therapy, which generally uses higher pressures and near-100% oxygen. While medical HBOT has established applications for specific conditions, research into mild-pressure systems is still developing, and the clinical findings from one cannot automatically be applied to the other.
The underlying physiology does, however, provide several areas worth investigating, particularly in relation to cellular energy, inflammation, circulation and tissue repair.
1. Mitochondrial Function: The Foundation of Cellular Energy
Mitochondria are responsible for producing much of the adenosine triphosphate (ATP) that powers our cells. From muscle contraction and cognitive function to tissue maintenance and repair, cellular energy is involved in almost everything the body does.
Oxygen plays a central role in mitochondrial oxidative phosphorylation, the process responsible for generating much of this ATP.
Hyperbaric oxygen research has investigated how increased oxygen availability may influence mitochondrial metabolism and cellular signalling. This is particularly relevant in tissues where oxygen supply may be limiting normal cellular function.
However, increasing oxygen availability doesn't automatically mean healthy mitochondria will produce more energy. Cellular energy production is regulated by several factors, and oxygen is only one part of that process.
For those interested in energy, recovery and longevity, mitochondrial function remains an important area of study, and its relationship with controlled oxygen exposure continues to attract research attention.
2. Inflammation: Understanding the Body's Response
Inflammation is a necessary part of normal physiology. It allows the immune system to respond to infection, injury and tissue damage, helping coordinate the processes involved in protection and repair.
Problems can arise when inflammatory activity becomes excessive or persists longer than necessary. Chronic inflammation is associated with numerous age-related health conditions, making inflammatory regulation an important area of research.
Studies involving conventional hyperbaric oxygen therapy have demonstrated changes in inflammatory signalling pathways, including certain cytokines and immune responses. Some findings suggest that controlled oxygen exposure may influence the balance between pro-inflammatory and anti-inflammatory activity.
These effects depend on the treatment conditions, including pressure, oxygen concentration, duration and the underlying health condition. Results from higher-pressure medical HBOT cannot automatically be extended to mild hyperbaric protocols.
While further research is needed to establish the clinical relevance of these responses at lower pressures, the relationship between oxygen exposure and inflammatory signalling remains an area of ongoing investigation.
3. Circulation, Angiogenesis and Tissue Repair
Healthy circulation is essential for delivering oxygen and nutrients to tissues, removing metabolic waste and supporting normal repair processes.
One area of hyperbaric oxygen research involves angiogenesis, the formation of new blood vessels from existing vessels.
Studies using conventional medical HBOT have demonstrated effects on growth factors and cellular signalling pathways involved in blood vessel formation and wound healing. These mechanisms are particularly relevant in certain medical conditions where tissue healing has been compromised.
From a recovery perspective, the ability to influence processes involved in circulation and tissue repair is worth investigating. However, there is an important distinction between the established medical applications of higher-pressure HBOT and the potential benefits of mild hyperbaric exposure in otherwise healthy individuals.
More high-quality research is needed before similar clinical outcomes can be confidently attributed to mild hyperbaric therapy.
4. Brain Health and Cognitive Performance
The brain accounts for a relatively small proportion of total body weight but consumes a substantial amount of the body's resting energy. Its function depends on a continuous supply of oxygen and glucose, making oxygen metabolism particularly relevant to neurological health.
Hyperbaric oxygen therapy has been investigated for its potential influence on cerebral metabolism, neuroplasticity and certain neurological conditions.
Some clinical studies using higher-pressure protocols have reported improvements in selected cognitive outcomes, although results vary between studies and patient groups.
These findings don't establish that mild hyperbaric therapy improves memory, concentration or cognitive performance in healthy individuals. Nevertheless, the relationship between oxygen availability, mitochondrial function and neurological activity provides a basis for continued research.
Understanding how the brain uses oxygen, and how changes in oxygen exposure may influence cellular processes, remains relevant to the broader discussion around brain health and longevity.
5. Recovery, Exercise and Physical Performance
Recovery has become a major focus within biohacking, particularly among athletes and people who train regularly.
Muscle repair and adaptation depend on several interacting processes, including adequate energy production, oxygen delivery, circulation, nutrition and appropriately regulated inflammation.
Because oxygen plays a role in tissue metabolism and repair, hyperbaric exposure has attracted interest in sports medicine. Research has explored its potential effects on muscle injury, fatigue and recovery markers, although findings have been mixed.
For mild hyperbaric oxygen therapy specifically, there is not yet enough high-quality evidence to establish it as a proven method of accelerating athletic recovery.
While the physiological mechanisms warrant further investigation, hyperbaric therapy should be considered alongside the fundamentals of effective recovery, including appropriate training loads, nutrition, hydration and sleep.
How Does Hyperbaric Oxygen Therapy Compare with Other Biohacking Technologies?
Different biohacking technologies influence the body through different physiological mechanisms.
Traditional and infrared saunas use heat to stimulate thermoregulation and cardiovascular responses.
Cold immersion introduces a different form of physiological stress, influencing temperature regulation, circulation and nervous system activity.
Red light therapy uses specific wavelengths of light to influence cellular signalling and other biological processes.
Wearable technology provides information about physiological measures such as heart rate, sleep and physical activity.
Hyperbaric oxygen therapy takes a different approach, using increased atmospheric pressure and oxygen exposure to alter the amount of oxygen available to the body.
What distinguishes hyperbaric therapy is its direct relationship with oxygen physiology, which is fundamental to cellular energy production and numerous biological processes.
That doesn't make it universally more effective than other interventions. These technologies are not interchangeable, and there is insufficient comparative research to establish mild hyperbaric therapy as superior to exercise, sauna, red light therapy or other approaches.
Each has different applications, and their relevance depends on the individual's health, objectives and the strength of evidence supporting their use.
Why Oxygen Deserves a Place in the Biohacking Conversation
Before introducing additional recovery technologies, the foundations of health deserve attention.
Sleep, nutrition, movement, hydration, stress regulation and healthy respiratory and cardiovascular function all influence how effectively the body operates. These are well-established areas of health that should remain priorities regardless of which additional technologies someone chooses to explore.
Once those foundations are in place, oxygen physiology becomes a relevant area of interest.
Oxygen is involved in cellular energy production, tissue metabolism and the normal function of almost every organ system. Understanding how oxygen is delivered and used throughout the body provides important context for evaluating oxygen-based therapies.
However, the fact that oxygen is essential doesn't mean greater exposure is always beneficial. Excessive oxygen can contribute to oxidative stress and other adverse effects, which is why the amount delivered, duration of exposure and individual circumstances all require consideration.
The purpose of exploring oxygen-based interventions should be to understand whether a particular approach offers a meaningful benefit, rather than simply increasing oxygen exposure for its own sake.
Does More Oxygen Mean Better Health?
Not necessarily.
The body has sophisticated systems for regulating oxygen delivery and maintaining the balance required for normal cellular function.
Although oxygen is essential for life, changes in oxygen availability can also influence reactive oxygen species, antioxidant responses and cellular signalling pathways.
Under appropriate conditions, these responses may contribute to useful physiological adaptations. However, the relationship is dose-dependent, and greater exposure does not automatically produce greater benefits.
Pressure, oxygen concentration, session duration and treatment frequency all influence the physiological response. This makes protocol selection an important consideration rather than assuming that higher pressures, longer sessions or more frequent treatments will produce better outcomes.
Hyperbaric exposure also requires appropriate screening, equipment standards and safety procedures. Particular considerations include ear pressure equalisation, underlying lung conditions and the fire risks associated with oxygen-enriched environments.
Any approach to biohacking should account for both potential benefits and the importance of safe, appropriate use.
Where Should Mild Hyperbaric Oxygen Therapy Sit in Your Biohacking Routine?
For someone who already has consistent health habits and is interested in exploring additional recovery technologies, mild hyperbaric oxygen therapy may be worth considering.
Its appeal lies in the opportunity to investigate a physiological system that is fundamental to cellular function. However, this doesn't mean everyone needs hyperbaric therapy or that it should take priority over interventions supported by stronger clinical evidence.
Regular exercise, adequate sleep, good nutrition and cardiovascular health remain central to long-term wellbeing.
For anyone considering mHBOT, several factors deserve attention: the intended outcome, the evidence supporting its use, the oxygen dose delivered by the equipment and whether the treatment is suitable for their individual circumstances.
A well-considered biohacking routine doesn't need to involve multiple technologies. What matters is choosing approaches that are appropriate, manageable and capable of contributing to meaningful health outcomes.
Key Takeaway: Biohack the Fundamentals First
With the growing number of technologies available for recovery and longevity, it's easy to focus on increasingly complex interventions while overlooking some of the most fundamental aspects of human physiology.
Oxygen is one of them. It's something we rarely think about, yet our cells depend on it continuously for energy production and normal function.
This is what makes hyperbaric oxygen therapy an area worth understanding. Its relationship with oxygen availability, mitochondrial metabolism, inflammatory signalling and tissue repair provides several avenues for research, particularly for those interested in recovery and long-term health.
However, understanding the physiology also means recognising the difference between established clinical applications and areas where evidence is still developing. The potential of a therapy should never be confused with proven outcomes.
A useful starting point isn't how many biohacking technologies can fit into a weekly routine, but which physiological processes need attention, and which interventions have the strongest evidence for supporting them.
The fundamentals of sleep, nutrition, movement and cardiovascular health remain the priority. Additional technologies can then be considered according to individual needs, available evidence and appropriate clinical guidance.
Ultimately, longevity isn't simply about adding more years to life. It's about maintaining the energy, mobility, strength and physical capacity to make the most of those years.
Written by Jason Gilbert, Medical Director at Breathe. Studios.