I decided to check before posting similar info re Metformin. I'd stumbled onto a similar article. Then, googled. And there is a lot about it on the internet, all positive or neutral.... nothing negative.
So, I checked, and you'd already started this thread Owen. Here's my add-on.
Asked my Doctor about it.... and he was aware that the Life Extension Foundation has been extolling Metformin's anti-aging benefits for some years.
I'm not Diabetic, but he saw no reason not to prescribe a low dose (500mg slow release) for me. (In Australia)
Don't ask; don't get !
Ask your Doctor what research he needs to see, to enable him to prescribe for you....
There is fair number of very detailed 'medical grade' articles on the net. And the FDA have just approved the TAME (?) Targeted Aging via Metformin study... because the anti-aging prognosis for this medication is so very good and risk free.