GHK Cu Peptide Benefits and Side Effects: What to Expect from Injections GHK Cu might be trending, but its not new., Before you inject yourself with this viral peptide, consider this., This copper peptide has been studied for years in skin repair and collagen signalling, A Patient Safety Threat Syringe Reuse StoryMD If you're using GHK Cu and it stings a little (which is common) this one's for you In this reel I'm sharing the small tweaks that have helped me make peptide injections