GHK Cu Topical Spray Wells Pharmacy Network GHK Cu Research Overview Copper Peptide Studies 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: Q&A: Optimizing Copper Peptide Through Next Generation Delivery Dermatology Times GHK Cu: The Peptide Everyone's Talking About theclinicroom