GrowtikaFinnish sauna heat exposure induces stronger immune cell than cytokine responses
https://www.tandfonline.com/doi/full/10.1080/23328940.2026.2645467#abstract
In Finland we have old saying: "If liquor, tar and sauna won’t help, an illness is fatal"
Tar?
Tar. Specifically wood tar,
Pine tar is used in topical medicine for dermatology around the world I don't think it's limited to anywhere particular.