Cu Peptide Before and After: What to Expect for Skin and Hair GHK Cu copper peptides calm, repair, strengthen If your skin often feels: red or reactive irritated even from gentle skincare tight, dehydrated or burning tired and sensitive 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK 11 BEFORE & AFTER ideas copper peptides, crepey skin, eyebrow lift