@chamath The primary distinction between a dry sauna (Finnish sauna, with 10-20% relative

Well SupportedFinnish men using sauna 4-7 times per week have 40-50% lower cardiovascular disease incidence and 40-50% lower all-cause mortality compared to those using it once a week.

Well SupportedDry saunas operating at 80-100°C with 5-20% humidity are effective for health benefits, with lower temperatures recommended for beginners.

Not SupportedWet saunas carry risks of chemical contamination, systemic absorption, and infections.

Partially SupportedWet saunas, especially with herbal oils, may benefit nasal, sinus, and airway congestion, though evidence is inconclusive.

Not Supported