Bryan Johnson· Author
Cabin altitude is ~7,000 ft. Hypoxia alone disrupts cortisol and suppresses nocturnal melatonin for hours after you land.
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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.
Cabin altitude is ~7,000 ft. Hypoxia alone disrupts cortisol and suppresses nocturnal melatonin for hours after you land.
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