Best Copper Peptide Hair Growth Serums: Summer 2026 Buyer's Guide Hairgenetix GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true?, Copper peptide, known as GHK Cu, has a growing body of peer Hair Growth Serum Intense with Copper Peptide GHK Cu GHK Cu for hair growth does it actually work?, Short answer: no., GHK Cu can be great for skin , but when it comes to hair growth, the evidence just isnt there., And this isnt just theory., As a Cosmecell GHK CU Super Facial Sunscreen SPF 50 PA++++: The Copper Pept