lol Okay, I'm sorry everybody. I completely misread the first question. I thought he was asking if gh caused back hair, not hair to grow back.
So in answer to the question, gh has certainly stopped the rate at which I was previously losing my hair. Even when I wasn't on, mine was getting thinner. I could tell it was about to fall out because it was first get kinky and curly, as if it were unhealthy. During my last brief test/eq/var cycle, I used finasteride and nizoral to protect my hair. Gh was there because I'm alway on it. I did notice that I didn't lose nearly as much hair as usual.
Ironmaster, who used to be the gh guru here, always said that your hair would start growing back, and even begin returning to its original color if it had turned grey, after about 4-6 months of gh. While gh does seem to have made my own hair healthier, I haven't grown much back.
Sorry for the confusion.