Regarding "monkey growth hormone," too lazy to check but I doubt they ever put that into humans. It was Steve Michalik who claimed he was buying monkey brains on the black market and drinking the growth hormone squeezed from the pituitary. Complete bullshit in my opinion as were the rest of his stories. And it obviously wouldn't have done anything anyway.
Regarding Alzado, many claimed it was well known (or bi I guess) in Venice (I think it was) that he was a homosexual. Some who knew him said there was nothing homo about him. He did blame growth but GH hasn't been associated with that type of cancer but well know to be associated with HIV. I don't know. You'd think he would have said he didn't know if drugs had anything to do with it.