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 Cosmetic Topical 5x 1g Ampules NEXAPH Copper, Collagen, and Controversy: Inside the GHK Cu Buzz Cosmetic GHK Cu (Copper Peptide) 99% Purity 1g Royal Peptides GHK CU Peptide for Skin Rejuvenation Wittmer Rejuvenation Clinic Can You Mix Retatrutide With GHK Cu? Risks and UK Guidance Bolt Pharmacy