Should Bodybuilders Take GHK Cu? Neurogan Health Many people think injecting peptides like BPC 157, GHK Cu, or TB500 directly over a painful area sends the peptide straight into the damaged tissue. But thats not how it works. When you inject Peptide Injection Site Reactions: What's Normal, What's Not, and What Revolution Health & Wellness 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 GHK Cu Injection AgelessRx All About GHK Cu Peptide More Than Just Cosmetic