Dr. Amy Shah on Instagram: "Is the bottom line – – sauna can be so beneficial for you based on so many studies out of Finland. Great for growth hormone which goes down as you age, great for longevity, for brain health, etc. but START slow. And feel free to do other things like heated yoga or other forms of heat therapy I get so many questions about sauna therapy. So here’s some guidelines about how long you should use it and why How does it work? There are many things that are happening, but esp