This applies to hot baths and hot jacuzzi'.......

Rhonda Patrick----"The sauna robustly increases levels of heat shock 
proteins for up to 48 hours. Heat shock proteins play a preventative role 
in neurodegenerative diseases among other things and sauna use is 
associated with a 66% lower risk of Alzheimer's disease."

"I have a new paper out with my coauthor Teresa Johnson on how the sauna is 
a healthy lifestyle practice to increase healthspan!"

https://www.sciencedirect.com/science/article/pii/S0531556521002916?via%3Dih
ub#bb0425
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My facebook friends research scientist Rhonda Patrick and husband Daniel in 
San Diego, Calfornia....via their website ["Found My Fitness"] they 
proliferate videos of Rhonda's informational lectures and extensive 
interviews of world leading researchers in nutrition medicine and health. 

On their way toward the half a million youtube subscribers 
.
http://www.foundmyfitness.com