Here's the thing, if you have absolutely no indication of insulin resistance, and no indication of excessively high or even mid-high insulin/igf-1 levels, I would say it is still acceptable to take metformin, but at a low dosage.
IMO metformin has gotten a horrendous reputation for bad sides because it was a drug that came out around the time boomers were ruining their bodies with terrible eating habits and developing full blown diabetes. So doctors were basically like: "Here, take a fuckton of it to treat your extreme diabeetus", and of course people got awful sides and doctors did not tell them you must, absolutely must supplement vit-b12 and folate because metformin will deplete you of both if you don't.
2 grams of metformin is stupidly high, and I would say just as a preventative you should be taking somewhere in the realm of 250-300mg of metformin if you are trying to lower certain hormones. If you can tolerate more titrate up. I would not exceed a gram in most cases, as that's when you get into side effect territory.
My Doctor wants me to take one last hormone panel before they put me on it, that will dictate my initial dose, but yes, I'm 100% going to try it because at this point I'm certain that testosterone is not my problem with regard to hair loss.
I'm pretty sure it's a matter of insulin/igf-1 and -maybe- DHEA, but I believe a lack of proper growth factors is a mitigating factor.
That's minoxidil territory, or PRP, but PRP is dummy expensive and I would not recommend doing what I did and get it once per month, it hurts all to hell and it's extremely expensive, but it absolutely -did- work, I just think that minoxidil would work just as well if I could get a dose that won't give me sides.