What Is GHK-Cu? Benefits, Risks & Research GHK-Cu (Copper Tripeptide-1) is a naturally occurring copper-binding tripeptide found in human plasma, saliva, and urine. It has been extensively studied for its effects on skin rejuvenation, wound healing, and anti-aging properties. What is GHK-Cu? GHK-Cu consists of the amino acid sequence glycine-histidine-lysine (GHK) bound to a copper…