GHK Cu, commonly known as copper peptides, are found naturally within the human body where they play a vital role in skin repair and maintenance. Copper peptides support optimal skin function by helping GHK Cu Peptide Benefits for Skin and Hair LIVV Natural Copper Peptide Serum for Hair Regrowth & Thinning Hair Feline Skinscience 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 isn't there. And this GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia