After a year of using GHK Cu both topically and going deeper than topicals (under my doctor's care), the difference in my skin is not something I have to squint at in good This peptide reverses aging, And its been hiding in plain sight for decades., GHK Cu (Copper Peptide) is one of the most researched anti aging ingredients out there., Heres what it does:, Your skin knows GHK Cu. Your body makes it naturally, then makes less of it with age. We concentrated it. Three formulas. One peptide. Each paired with a single bioactive, chosen for a GHK Cu Organic Serum Copper Peptide for Anti Aging & Skin Repair