Let's talk about a peptide that actually changes how skin and hair heal GHK Cu. GHK Cu (Copper Tripeptide 1) is a naturally occurring peptide that signals skin and hair cells to heal, regenerate, Tumor angiogenesis: molecular pathways and therapeutic targets Nature Medicine Rejuvenation and Youth with GHK Cu Peptide Treatment Dr. Ahmet zyigit PDF) GHK, the Human Skin Remodeling Peptide, Induces Anti Cancer Expression of Numerous Caspase, Growth Regulatory, and DNA Repair Genes