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 Peptide Dosage How to Use Copper Peptides, Injections Neurogan Health 7% GHK CU ACCELERANT Platinum Skin Care The Best Injection Sites for GHK Cu Peptide Therapy GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? Squalane + Copper Peptide (GHK Cu) Rapid Plumping Serum