Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with GHK Cu (Copper Peptide) 50mg 99.80% Purity Research Peptide Miro Biotech GHK Peptide Injection and GHK Cu Benefits, Uses ,safety Four reasons this serum belongs in your routine. GHK Cu Peptides that firm and support collagen renewal. Barrier support to keep your skin healthy and resilient. No injection. No needles. No clinic visit.