Growth Hormone Peptides: The difference between Sermorelin, Ipamorelin, and Tesamorelin Just because a claim gets repeated across large accounts doesn't mean that it is true. It is simply not true that we do not have any human studies on peptides. Not including GHRH vs GHRP Growth Hormone Research Differences PRG Sermorelin, GHRP 6, GHRP 2 9mg (Blend), Packaging Type: Bottle at 3000 box in Medak GHRP 6 10MG (X5) & IPAMORELIN 10MG (X5) Peptides World