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 BEAUTY PEPTIDE DETAILS + TIPS + why this peptide is everywhere right now, GHK Cu (copper tripeptide) goes beyond surface level beautyits naturally found in the body but declines with age. Known The Peptide Craze Ground Truths The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy