Can subcutaneous injection of GHKCu (copperbinding peptide) increase the risk of cancer? Subcutaneous Injection: What It Is and How to Give One 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 Subcutaneous Injection Sites and Instructions for Safe Self Administration GHK Cu Copper Peptide Benefits, Uses & Safety Intra V