Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience GHK Cu Scalp Serum Copper Peptide for Hair GOAL.MD So excited about this peptide! GHK Cu serum and scalp solution available Fascinating peptide that helps to prevent and reduce fine lines and wrinkles. Applied topically on the scalp for hair growth. Does it work? Maneup GHK Cu hair growth serum : r tressless The Science and Benefits of GHK Cu Peptide: Skincare, Hair Growth, and Beyond