Absolute GHK cu Stem Cells & Peptide Hair Growth Serum and Shampoo MTS Set Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience GHK CU Hair Serums Explained: Real Results for Thinning Hair and Scalp Revival 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 Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum