I'm interested in using HGH for performance enhancement. Is this safe?

No. Hgh is highly regulated. If you have a true low hgh levels then it will help otherwise I would stay away from it as in excess it might cause cancer, but we are not for sure yet. Needs more research.
Not Legal Use. Using HGH for performance enhancement is not a legal use. The only legitimate indication is for treatment of a medical diagnosis of adult human growth hormone deficiency. It’s safe to use HGH when indicated and under qualified medical supervision. It’s unsafe to self-administer hgh. If HGH is prescribed to replace a diagnosed deficiency, performance enhancement may be a beneficial side-effect.