GHK Cu Side Effects, Complications, and Risk Profile GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has Subcutaneous Injection: What It Is and How to Give One GHK Cu Copper Peptide Face Cream GHK Cu has been studied for decades. Clinical research shows it supports firmer, tighter looking skin, improves overall texture, and helps bring your skin back to a more youthful state., Even better? PSA] Albeit rare Copper peptide "uglies" are real and scary. Case report and looking for advices : r SkincareAddiction