If you ran deca solo you won’t lose hair. Even on 2-3g a week. No hair loss. It’s pretty much impossible. That comes with its own set of issues which I’ve discussed before though. Believe it or not it’s not so much libido related, but blood pressure and cardiac related.
Key to hair growth is hgh + minoxidil + microneedling. Without hgh or peptides you can’t achieve significant regrowth. But I’ve seen guys regrow hair on even straight test or eq with high doses of GH. Androgens decrease igf1 in the dermal papilla. With minoxidil and GH you get 1+1 = 3 effect and microneedling amplifies it even further.
For me though I shave my shit so I don’t care lol, I’m kind of in the same boat as you here, but for guys who want hair this is relevant info