Cold Exposure Cognitive Enhancement Brain: The Science of Cold Showers, Cold Plunges, and the Brain
A 530% increase in norepinephrine from three minutes in cold water. That’s not a typo. That’s what happens when you expose your body to cold water at 14°C, and it’s the reason cold exposure has moved from fringe biohacking into mainstream cognitive enhancement protocols in 2026. The mechanism is simple: cold thermoreceptors in your skin…