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 you're GHK Cu: Skin Healing, Anti Aging, & Hair Growth Benefits Unlocking the Secrets of GHK Cu: The Revolutionary Peptide for Youthfu Copper Peptides Before and After: Visible Skin Improvements Explained Hubmed 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