GHK Copper Peptide GHK Cu Tripeptide 1 GHK Cu Peptide Therapy for Radiant Skin by Desert Mobile 7 days on GHK Cu. Here's my honest update. I'm not going to hype this up because the real results don't even start until week 46. But something is already happening. GHK Cu (copper peptide) is one of the most talked about wellness peptidesand for good reason This naturally occurring peptide has been studied for its potential to support skin quality, hair health, and GHK Cu Topical vs Injection Which is the Better Copper Peptide Form?