Summarized by Masters of Longevity from Youtube — Bryan Johnson.
A short guide categorizing three sauna exposure levels and the distinct health effects associated with each temperature and duration tier.

Key Takeaways
- Tier one sauna exposure associates with increased life expectancy and lower chronic disease risk in population studies.
- Tier two—frequent sessions four to seven times weekly—links to lower mortality, reduced heart disease risk, and less dementia risk.
- Achieving a core temperature around 102.2°F triggers heat shock protein release that promotes cellular protein repair.



