Copper Peptides (GHK Cu): Benefits and Side Effects 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 Peptide GHK CU Cream Concierge MD GHK Cu Topical Cream GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not