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 Mitigating GHK Cu Injection Pain: Tips and Tricks Gabriel Alizaidy, MD, MS posted on the topic LinkedIn The GHK Cu Peptide: Benefits, Uses, and Why it's Known as the Regenerative Copper Complex GHKCu Copper Peptide Therapy Skin & Healing Regeneration