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 DIY GHK Cu Serum at Home Anti Aging Hack That Actually Works! YouTube superPeptide 1% GHK Copper Peptide Serum Pure & Cimple GHK Cu Body Lotion 5000mg, Copper Peptide, 8oz Neurogan Health How to Mix GHK Cu Powder? Knowledge ZB Biotech