Are ice baths good for you? What you need to know before taking the plunge

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...