GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration What is the optimal dosing regimen of GHKCu for topical skincare and woundhealing applications? GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not PDF) Effects of GHK Cu on MMP and TIMP Expression, Collagen and Elastin Production, and Facial Wrinkle Parameters GHK CU Cream