Primo no question. Mast isn’t great. But I’ve seen dudes bald on legitimate Bayer primo. It’s probably the worst one out there. Mast is top 5 worse, but I’d say MENT, tren, and primo are worse.
Btw, you guys are pretty much fucked unless you run Deca only and catch the hair loss early. I’m not a fan of the lack of DHT in my system from deca only. Funnily enough my libido is great on it. But I have zero drive and my mood is always pretty messed up. Gave me wicked anxiety too. But if you want hair and don’t give a shit or can handle the sides, 300mg deca will do it. Promise no one here will shed on it. Some people can do good on dbol only and not lose anything. But it’s easy to get gyno and you’ll probably need nolva. Another issue because nolva is hair toxic as hell.
I find a combo like deca/primo or deca/mast and test, if even included, at a trt dose MAX (and that’s pushing it) is far better on the hair then a test/mast or primo run and looks 100% better aesthetically. Nandrolone has Affinity itself for the ER. It will activate the receptors and that’s why it can give Gyno at high doses. It’s not prolactin, test causes that to rise. My prolactin on 600mg deca was 2.0 ng or pg/dl. Very low.