How to Measure and Inject GHK Cu (Copper Peptide for Skin and Tissue Repair) YouTube 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 Essential GHK Cu Serum: What It Is, How It Works, and Why It Matters f Bacteriostaticwater.com If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection