Why I decided to try GHK-Cu At 52, after decades of losing and gaining weight, I noticed my skin wasn't "snapping back" the way it used to. The loose, crepey skin on my arms was becoming more noticeable, and I was curious whether GHK-Cu (glycyl-L-histidyl-L-lysine copper) could actually improve skin quality—not just in theory, but in real life. Rather than relying on someone else's before-and-after photos, I decided to become my own experiment. My Protocol Peptide: GHK-Cu (Co