What is GHK Cu and Why is Everyone Talking About It? GHK Cu (Copper Peptide) is a powerful, naturally occurring compound in the body that plays a key role in skin health PSA] Finally, a Dr. explains the mechanism behind the "copper uglies" : r SkincareAddiction GHK Cu Side Effects, Complications, and Risk Profile The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline PSA] Albeit rare Copper peptide "uglies" are real and scary. Case report and looking for advices : r SkincareAddiction AHK Cu (Copper Tripeptide 3) Ingredient Guide Nubeean Noosa