elevated CO₂ triggers the Bohr effect, releasing ~26 mL of extra oxygen per minute to tissues
The Bohr effect due solely to the 6 mmHg arterio-venous increase in PCO₂ contributes to the release of more than 26 mL of O₂ per minute, accounting for approximately 10% of total oxygen consumption at constant PO₂.
What this means for you
When CO₂ rises slightly in the blood, your red blood cells are signaled to release more oxygen right where your body needs it most — muscles, organs, skin. This natural mechanism, called the Bohr effect, means tissues get a meaningful boost in usable oxygen without any change in breathing rate or effort.
The published research
In vitro characterization of hemoglobin oxygen dissociation curves and electrolyte shifts in human blood under varying PCO2
Frontiers in Medicine · 2026
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