Science

A single sauna session sends immune cells surging through your body

A new Finnish study reveals that just 30 minutes in a sauna can temporarily flood the bloodstream with additional white blood cells, potentially helping the immune system patrol the body and detect threats.

✦ Extractive summary — built from the sources' own reporting•From 1 source•1 min read•Updated October 28, 2026, 12:37 PM UTC

The surprising response resembles the immune boost seen during exercise and may help explain some of the health benefits linked to sauna bathing.

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