GHK Cu Copper Peptide for Hair Loss: Results, Mechanism, and What to Expect Next up in our peptide highlight series is GHK Cu. If skin support, hair health, and healthy aging are part of your goals, this is one worth knowing about. GHK Cu is a copper GHK Cu Copper Peptide Benefits, Uses & Safety Intra V 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