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 GHK Cu supports tissue repair and regeneration Healthy skin works best when it's supported on every level.interested? Please Read GHK Cu main ingredient It's a copper peptide your body naturally produces when you're young. It plays a key role in Copper peptide GHK Cu Wikipedia 11 BEFORE & AFTER ideas copper peptides, crepey skin, eyebrow lift