Rhonda Patrick· PhD
Cold shock can boost norepinephrine up to 5-fold
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The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
Cold shock can boost norepinephrine up to 5-fold
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Norepinephrine is increased by the cold, and it suppresses the cytokine production, but the epinephrine from the breathing does it even more robust.
people people that were walking around in 16° C air you know temperature for 6 hours increase their norepinephrine by 260%
people people that submerged theirself in 4.4 de C water um for 20 seconds were able to increase their norrine by 200 to 300%
But the bottom line here is dose and duration dependent.