Bryan Johnson· Author
Stiffness in the small arteries is a bad sign of vascular health. Flexible arteries are good; non-flexible arteries are bad.
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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.
Stiffness in the small arteries is a bad sign of vascular health. Flexible arteries are good; non-flexible arteries are bad.
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