Bryan Johnson· Author
Limiting total misaligned days and giving at least 10 contiguous aligned days between zone shifts keeps you far from the chronic-exposure regime used in these experiments.
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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.
Limiting total misaligned days and giving at least 10 contiguous aligned days between zone shifts keeps you far from the chronic-exposure regime used in these experiments.
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