Copper Peptide Barrier Cream Yunasence GHK Cu with Ceramides YUNASENCE GHK Cu Organic Serum Copper Peptide for Anti Aging & Skin Repair What is GHK Cu? GHK Cu is a naturally occurring copper peptide composed of three amino acids bound to copper. It functions as a signaling molecule in the skin, helping to support repair processes, GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B What is GHK Cu Cream? GHK Cu is a topical peptide cream featuring copper peptides that support your skin's natural repair process. Backed by science, this ingredient offers a range of skin enhancing benefits: