Using sauna 4-7x per week lowered dementia risk by 66% & Alzheimer's risk by 65% after adjusting for diet/lifestyle.
“One of the reasons I find this study so compelling even though it is associative data and does not establish causality is because the sauna activates heat shock proteins, which have been shown in countless animal studies to play a causal role in preventing Alzheimer's disease and other neurodegenerative diseases.”