HCG is one of the most important substances used in post-cycle-therapy. It stimulates the body to make natural testosterone, which is suspended during cycles of anabolic steroid use. As medicine, HCG is used to treat hypogodadism and as a fertility treatment in men. In a steroid cycle, it is important to not use too much HCG as it will cause the testes to shut down via negative feedback.
who said 400 iu e3d imo that might be a bit high