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.