What is the best human growth hormone to build muscle?

I'm curious, could you please elaborate on the topic of human growth hormones and their potential impact on muscle growth? Specifically, I'd like to know which HGH, if any, is considered the most effective for building muscle mass? Are there any scientific studies or clinical trials that support the use of HGH for this purpose? Additionally, what are the potential risks and side effects associated with using HGH for muscle building? I'm interested in learning more about the safety and efficacy of this approach.