Bryan Johnson· Author
A U-shaped relationship was observed for body fat percentage with increasing international travel. The trend got worse when the sum of travel was extensive, reaching 15-20 days per 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.
A U-shaped relationship was observed for body fat percentage with increasing international travel. The trend got worse when the sum of travel was extensive, reaching 15-20 days per month.
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