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 GHK Cu may Prevent Oxidative Stress in Skin by Regulating Copper and Modifying Expression of Numerous Antioxidant Genes Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare