Far Infrared saunas might be the most underrated longevity tool we own.

Most people treat the sauna as a place to relax after a workout. The research says it's doing far more than that.

Sitting in deep heat makes our heart work the way it does during moderate exercise — our pulse climbs, blood vessels open up, and circulation improves.

Done consistently, that "passive cardio" effect is linked to lower risk of heart disease, stroke, high blood pressure, and even dementia.

Most of these findings come from large Finnish studies where regular sauna use (4–7x a week) was the sweet spot. One session won't transform our health — the magic is in the habit.