Co delivery of bioactive peptides by nanoliposomes for promotion of hair growth ScienceDirect GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect Ingredients Hairgenetix GHK Cu, AHK Cu & PDRN Peptides 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 vs AHK Cu: Which Copper Peptide Is More Effective? Randomized controlled trial on a PRP like cosmetic, biomimetic peptides based, for the treatment of alopecia areata