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Cold plunge benefits — real or placebo?
I've been doing 2-minute cold plunges at 50°F (10°C) every morning for 3 months. I feel amazing after each session, but I'm struggling to find solid evidence that it actually extends lifespan or improves biomarkers long-term. The dopamine and norepinephrine spikes are real but transient. Is cold exposure actually doing anything for longevity, or is it just an expensive way to feel alert?
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Huberman oversold this. The actual studies on cold exposure and longevity in humans are basically nonexistent.
I think the stress resilience aspect is underrated. Hormesis is a real mechanism. But you don't need a $5k plunge — a cold shower works.
The brown fat activation is real and measurable. Whether that translates to longevity benefits is another question entirely.