GHK Cu Injection Pen Australia Subcutaneous Copper Peptide Inject+ Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms Peptides for Plastic Surgery Recovery: A Clinical Guide to GLOW, KLOW, and NAD Plus Frank Agullo, MD 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