How to Measure and Inject GHK Cu (Copper Peptide for Skin and Tissue Repair) YouTube GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia No, were not actually injecting copper , GHK Cu is a peptide your body already makes (just less of it as you age). It binds to copper and helps signal repair., Why people are into it:, supports You started using a GHK Cu peptide serum on your face and now , The things no one tells you., Yes, the injections can hurt like a bitch. , Heres the thing Ive found it works even better topically, Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare