Copper Peptides: GHK Cu is your skin's built in botox Fatskn Injectable Peptides for Anti Aging? A Dermatologist Explains GHK Cu YouTube The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, Why Collagen Loss Accelerates After 40: The Role of GHK Cu in Menopaus Pure & Cimple week 3 of using GHK Cu peptide pin. If I take a photo with the same lighting? How much of a difference do you think there will be? #ghkcu #peptide #look #looksmaxing #glowup