Bryan Johnson· Author
What’s often overlooked is that CO₂ is the body’s main signal for breathing regulation. Specialized sensors in the brainstem and carotid arteries continuously monitor CO₂ and pH to adjust every breath you take.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
What’s often overlooked is that CO₂ is the body’s main signal for breathing regulation. Specialized sensors in the brainstem and carotid arteries continuously monitor CO₂ and pH to adjust every breath you take.
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