Subcutaneous Injection Sites and Instructions for Safe Self Administration How to Measure and Inject GHK Cu (Copper Peptide for Skin and Tissue Repair) YouTube Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms 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