GHK Cu Scalp Serum Copper Peptide for Hair GOAL.MD Copper peptides support skin repair, barrier recovery, and firmness signalling. But GHKCu is different not all copper peptides behave the same. A new 3% GHK Cu option from MySeries makes GHK Cu vs AHK Cu: Which Copper Peptide Is More Effective? Amazon.com: Skin Perfection GHK Cu Copper Peptide Powder 99.7% Pure DIY Copper Peptides Serum for Face and Scalp Cosmetic Grade GHK Cu 1 Gram Creates Up to 100ml for Fuller Hair and