One of my personal favorite peptides: GHK Cu (Copper Peptide) I've been using this one consistently and I absolutely love what it does for skin health, healing, and overall cellular repair. GHK Cu is Ghk Cu Hair Serum Etsy GHK Cu Peptide Serum: Copper Peptides for Skin Firmness Mythos Mythos Skincare Copper Peptide Hair Growth Serum 10% GHK Cu & 5% AHK Cu Hairgenetix GHK Cu is a naturally occurring copper binding peptide that plays a major role in tissue repair and remodeling, with a strong focus in research on skin and hair biology. It works by signaling