Capsaicin in some peppers, attacks cancer cells' mitochondria. They found capsaicin, an ingredient of jalapeno peppers, triggers cancer cell death by attacking mitochondria-the cells' energy-generating boiler rooms. The research raises the possibility that other cancer drugs could be developed to target mitochondria.
However, it is notable that, in modern Russian, a sauna is often called a Finnish Banya, though possibly only to distinguish it from other ethnic high-temperature bathing facilities such as Turkish baths referred to as Turkish Banya.
If you're not good with heat, then the sauna is probably not a good relaxation technique for you. Some people light to bring water with them into dry saunas. You can forget everything that you have read before if you are using Finnish sauna.