Peptides for Longevity: BPC 157, TB 500, GHK Cu & CJC 1295 Topical GHK Cu: Skin Benefits, Best Forms, and Where to Buy 2 weeks in on GHK Cu and the glow is REAL. Brighter complexion More even skin tone Less breakouts Softer fine lines Thicker, fuller hair This is just A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend 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 A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend