I take Metformin and don't have diabetes, but don't think there's much of a chance of significant benefits. Would expect diabetics etc to have noticably higher healthapans offset by the diabetes symptoms. It's been a heavily-taken drug for decades...

Metformin is a prescribed drug, so how do you obtain a prescription if you're an otherwise healthy person (i.e., someone w/o diabetes)?

Not the parent, but I take it by going to any pharmacy in Ukraine and asking for it. Prescription not required. In my case it’s part of a treatment protocol for insulin resistance but the pharmacist doesn’t ask and I don’t tell them.

When I lived in Georgia it was also that easy.

It's also not a prescribed drug everywhere. Some countries do let people make medical choices on your own without needing to have your hands held by some legal gatekeeping for even minorly risky drugs.

Know a doctor.

Isn't there some liability there?