Revitalize Your Skin: The Benefits of Copper Peptide for Youthful Glow GHK Cu is one of the most powerful regenerative peptides for skin, hair, and overall tissue health. GHK Cu supports collagen production, healing, and visible rejuvenation from within. It's commonly used to improve skin 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 Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare GHK Cu Copper Peptide Collagen Boost & Skin Regeneration Calibrate Hydration A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend