GHK Cu Peptide: Benefits for Tissue Repair, Healing, and Recovery Revolution Health & Wellness The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline GHK Cu Peptide: What It Does for Body Composition and Metabolic Health 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 Subcutaneous Injection Sites and Instructions for Safe Self Administration