Bryan Johnson· Author
Those who travelled 21+ nights per month were 1.7–3.7 times more likely to screen positive for anxiety, depression, alcohol dependence, smoking and poor sleep compared with 1–6 nights/month.
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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.
Those who travelled 21+ nights per month were 1.7–3.7 times more likely to screen positive for anxiety, depression, alcohol dependence, smoking and poor sleep compared with 1–6 nights/month.
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