Well I tried genotropin hgh. I took 1 1.2mg miniquick injection twice a day one in the morning and one at night for 60 days. It was about 2 months ago when I finished taking it. I did get stronger, gain some indurance and My joints feel better now. I lost none of the strength or endurance I gained after I quit taking it. It is definately not the best bang for your buck, but it is very clean stuff!