dude, after reading these boards religiously for the past 3-4 months i've concluded that any of these compounds can be hard on your hair and it's more or less impossible to predict which one will be the worst from person to person. do a search on "hairloss" and you'll see that.
for myself i've only done Test Prop, Winstrol and Proviron so far. these are supposed to be some of the worst in the hairloss department but i've had no problems (and i'm predisposed). i've decided just to do the compounds i want to do and "max protect" with minoxidil/acelic acid, Polysorbate 80, Nizoral 2% and finasteride when i'm on.
Nadr