RE: What age to stop??????
There's a video i've seen re: a 70yr old who's still on it. He say's he's "the long term study". He looks phenominal on it.
I think he'd probably have to be much, much more careful re: his lipids, blood pressure and fitness level...but aside from that...so long as he looks after himself and is generally healthy, I'd assume he's ok.
Hormone replacement therapy is all the rage in the US at the moment, and all they do is give you AAS injections every few weeks. Loads of celebrities (Joe Rogan etc.) on it.