Andrew Huberman· PhD
If it's cold, it means you vasoconstricted. If it's warm, it means the hot blood is still going there. Okay. So we do that in the lab.
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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.
If it's cold, it means you vasoconstricted. If it's warm, it means the hot blood is still going there. Okay. So we do that in the lab.
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You want to assess whether or not your palms actually feel cool to the touch by somebody else. And if it does, that means you've essentially shut down the portal. You're sealing in more heat, which is bad.
Your idea of frozen peas is a good idea after you hold the cold peas in one hand and you switch it to the other hand. If someone then comes and feels your hand, is it warm or cold? If it's cold, it means you vasoc constricted. If it's warm, it means the hot blood is still going there.