Scroll through Instagram and you might think ice baths are the ultimate biohacking ritual. From actor Chris Hemsworth to podcaster Joe Rogan, the message is unanimous: a few minutes in freezing water can supposedly help suppress inflammation, fortify immunity and provide a dopamine-driven mental clarity.
The hype has spawned a global industry of cold-plunge tubs, recovery clubs and social media challenges.
According to Danish scientist Susanna Soberg, a leading researcher on cold-water immersion, the benefits of deliberate cold exposure are real – but often misunderstood.
