Rigid flexible nanocarriers loaded with active peptides for antioxidant and anti inflammatory applications in skin ScienceDirect Copper, Collagen, and Controversy: Inside the GHK Cu Buzz GHK Cu Copper Peptide Benefits, Uses & Safety Intra V 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