A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend 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 Two Weeks on GHK CU by Rory Uphold The Ladies Room Hebe GHK for Hair Loss Just 3 Months In! GHK Cu is a game changer for hair restorationjust 3 months of treatment and the difference speaks for itself. Stimulates growth