Andrew Huberman· PhD
Amplifiers: Cold exposure (1-5 min, circa-waking & BEFORE exercise).
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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.
Amplifiers: Cold exposure (1-5 min, circa-waking & BEFORE exercise).
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1 -3min cold shower or plunge immediately after waking up (AWA).