Definitive Guide on Peptides for Skin and Hair Care Infusion Clinic ABQ Hair Growth Serum Intense with Copper Peptide GHK Cu Copper Peptide Hair Growth Shampoo GHK Cu for Hair Loss Hairgenetix 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 AHK Cu + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan Neurogan Health Copper Peptide Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience