Fraley What's the difference between GHK Cu (copper peptide) as a topical cream vs an injection? In this video I break down: What GHK Cu is and why it's used in anti aging skincare Topical GHK Cu: Skin Benefits, Best Forms, and Where to Buy Unlocking the Secrets of GHK Cu: The Revolutionary Peptide for Youthfu The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline A Dermatologist's Take on the Copper Peptide (GHK Cu) Trend