Revitalize Your Skin: The Benefits of Copper Peptide for Youthful Glow GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy Uses and Benefits #ghk GHK Cu is a naturally occurring peptide in human plasma that declines with age. When used in injections (usually subcutaneous), it can offer various benefits: Skin Rejuvenation and Anti Aging: GHK Cu Focal Point Vitality Ghk Cu Intra Nasal Spray 50 mg 0.34 oz. Westend Medical Supply