Andrew Huberman· PhD
Now the activation of brown fat is a sympathetic nervous system response. So any lowering of core temperature that will let the thermostat say you're too cold is going to turn on sympathetic.
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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.
Now the activation of brown fat is a sympathetic nervous system response. So any lowering of core temperature that will let the thermostat say you're too cold is going to turn on sympathetic.
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because it seems that the brown fat is also activated when we get warmer in our skin so it's also um maybe a temperature regulator in our in our body