The reason why your head sweats so much is a sauna is your body is trying desperately to keep the temperature of your brain down, because you will die very quickly if your brain gets too hot. The sweat is not coming from inside your brain, its coming from underneath your skin and outside of your skull.
You keep on responding using the term blind cutler follower like nobody who chelates following the cutler protocol has done any research. Seriously, please do some research Ole, the blood brain barrier is a real thing, look it up. I do believe you feel mental improvement from the sauna, but all of the body affects your mental state, for instance you can have brain fog because of yeast in your digestive tract.
Here is a quote about saunas and internal body temperature
Although skin surface temperature may rise several degrees Celsius, internal body temperature is kept relatively unchanged. Prolonged sessions in the sauna may lead to a change of a degree or two. More in this article by Mikkel Aaland.
I'd be willing to bet your brain stays pretty much unchanged temperature wise, so how would the heat from the sauna affect the mercury in the brain if it doesn't get any hotter?
