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 Wellness peptide craze: why people are injecting drugs 'not for human consumption' Figure 2 from GHK Copper Peptide in Skin Remodeling and Anti Aging ! GHK Cu in Skin Remodeling Semantic Scholar How to Use Copper Peptides Guide Neurogan Health GHK Cu Peptide Injections: The Future Of Skin And Hair Care