Peter Attia· MD
and aging and people ask me well all this loosing stuff when does it really come in into play you know is it is it's not as important for a 20y old as it is for a 60 but where's the middle ground you know where does it change and I think it's a little like bone health I think once you're once you're 40 you're sort of on the back end of that and you need to be much more careful