GHK Cu Peptide: What to Expect Week by Week TikTok Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference GHK Cu: The Elegant Copper Peptide for Skin and Scalp Renewal Renew Vitality Peptides are the hottest word in wellness right now, so naturally I had to dive in!, The peptide stack I am trialing is GHK CU (hair, skin & nails) and Glutathione (neutralizes free radicals, reduces