The science

Respiratory health

Our cells are constantly monitoring oxygen levels. When oxygen is low—a condition called hypoxia—the body activates a powerful response system led by proteins known as Hypoxia-Inducible Factors (HIFs).

What is HIF?

HIF-1 (Hypoxia-Inducible Factor 1) is a protein that acts like a switch, turning on specific genes that help the body adapt to low oxygen. Under normal oxygen conditions, HIF-1 is quickly broken down and remains inactive. But when oxygen levels drop, HIF-1 becomes stable and active.

Once activated, HIF-1 helps the body adjust by:

  • Stimulating new blood vessel growth
→ Improves oxygen delivery to tissues
  • Shifting energy production
→ Moves cells from oxygen-dependent energy (oxidative) 
to a more efficient low-oxygen process (glycolysis)
  • Supporting redox balance and cell survival
→ Protects cells during stress or reduced blood flow

This adaptive mechanism is vital in many situations—during exercise, at high altitudes, or when recovering from illness. It also plays a role in conditions like heart disease, stroke, and aging. Controlled stimulation of HIF pathways can enhance recovery, improve vascular health, and boost resilience.

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IHHT®: Smart Breathing
Therapy to improve Health

What is IHHT®?

Intermittent Hypoxia-Hyperoxia Therapy (IHHT®) is a medically supervised breathing method that alternates between low oxygen (hypoxia) and high oxygen (hyperoxia) phases. It is the complete name of the method used by ReOxy® device. This controlled exposure teaches your body to adapt and increase its resilience to this specific environment — improving how your cells use oxygen, boosting energy, and supporting recovery.

Why Oxygen Variation Matters ?

Our body is designed to respond to changes in oxygen. When oxygen levels drop briefly (hypoxia), it triggers powerful biological responses. When followed by a boost in oxygen (hyperoxia), specific biological mechanisms are triggered. This cycle of stress and recovery strengthens the body.

What Happens in the Body During IHHT®?

Short-Term Benefits (After Just a Few Sessions)

SystemWhat happensWhy it helps
LungsFaster, deeper breathing & better ventilationMore oxygen reaches your tissues
HeartHigher pulse & stronger circulationSupports organs like brain and muscles
Blood VesselsBetter blood flow to brain & heartImproved focus, stamina, and heart function
BloodMore red blood cells releasedDelivers oxygen more efficiently

Long-Term Adaptations (With Regular Therapy)

SystemLong-Term ChangesHealth Gains
LungsMore alveoli & capillariesBetter oxygen absorption
HeartMore heart capillaries & mitochondriaStronger, more efficient heart
Blood VesselsGreater tissue perfusionMore oxygen to muscles and brain
BloodStimulated red blood cell productionHigher oxygen-carrying capacity

IHHT® is part of a new wave of personalized, natural and data-driven medicine. 

With ReOxy® this method is now accessible — easy to use, safe, and guided by smart technology.

ReOxy® is the only device of it’s kind
with clinically proven benefits.

Reach out to us or discover more.