What are the benefits, recommended regimen, and safety considerations of topical GHKCu (copper peptide) for skin repair and rejuvenation in healthy adults? 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: GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health GHK Cu Peptide Benefits for Skin and Hair LIVV Natural