Absolute GHK cu Stem Cells & Peptide Hair Growth Serum and Shampoo MTS Mall of California GHK Cu Peptide Therapy as the perfect skin and hair rejuvenation tool. Simply combining GHK Cu peptide with your favourite cream or serum creates a blend suitable for application to your face, neck 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 Hair Growth Serum for Hair Loss & Thinning Hair Feline Skinscience