Ghk cu is honestly amazing for firmer, tighter, more lifted skin!! As we age, our natural copper peptide levels drop, which slows down collagen + elastin production (aka the proteins that keep your Two Weeks on GHK CU by Rory Uphold The Ladies Room Peptide GHK CU Cream Concierge MD New: An FDA decision to place 19 peptides on the unsafe list was supported by numerous documented safety concerns, former officials said. Even though demand for peptide therapies has exploded since then, GHK CU Cream Skin Care: What It Really Does for Aging Skin A Real User's Experience