Can You Use GHK Cu Peptides with Vitamin C Serum? Expert Guide GHK Cu is more than a skincare trend its a copper peptide involved in repair, regeneration, and cellular signaling., This peptide has been studied for its connection to collagen production, skin Peptides: The growing W E L L N E S S trend that everyone is talking about! You may have heard about BPC 157 and GHK Cu two peptides gaining attention in How long will a 50 mg supply of GHKCu last when dosing 2 mg daily for five consecutive days followed by two days off each week? Neurogan Health, Copper Peptide GHK CU, 120 mcg, 60 Tablets iHerb