There are so many on the market now. I used for a long time (360 packets am/pm) the hGH Promino Plus by ISS Research. I wanted to give it a fair shot and took it for 3 months.
I won't bash all the GH OTC products because I don't have expereinece with others, but I can say the hGH Promino Plus didn't seem to do much at all. I would say it probably had a very small effect on my bodyfat%, but not discernable to the naked eye. They are pretty expensive for OTC products, just doesn't seem worth it bro.