GHK cu hard spots at injection site : r Peptides Peptide Therapy EPMWC Meet GHK Cu, the peptide designed to help your skin repair itself. From supporting collagen to promoting hair growth, this "Copper Peptide" offers powerful benefits for your wellness routine. Check out the details Spinal Disc & Joint Healing Peptide Elite Performance Health Center 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