GHK Cu Copper Peptide Troche Skin, Collagen & Healthy Aging AgeMD The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu Copper Peptide Twin Pack by Emrald Labs Elite Supps GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B 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