Product Question] Most effective way to deliver GHK Cu (Copper Tripeptide 1) through skin? : r SkincareAddiction The Complete Peptide Guide: Reconstitution, Injection & Storage Extension Health 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 Peptide: Hair Regrowth for Thinning & Alopecia Definitive Guide on Peptides for Skin and Hair Care Infusion Clinic ABQ