GHK Cu 50mg Dosage Protocol PeptideDosages.com GHK Cu 50mg Particle Peptides GHK Cu 50mg GHK Cu is more than a skincare trend its a copper peptide involved in repair, regeneration, and cellular signaling., This peptide has been studied for its connection to collagen production, skin The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline 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