2% GHK CU Copper Peptide Serum for Hair Growth and Scalp Care Seraphime GHK Cu (Copper Peptide) has emerged as one of the most promising regenerative peptides for hair restoration due to its ability to stimulate follicular activity, improve scalp circulation, reduce inflammation, and prolong the Neurogan Health, GHK Cu Copper Peptide, Hair & Scalp Serum Copper Peptide 10% GHK CU, 5% AHK CU with Oligopeptide 1 Hair Treatment Serum eBay