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 YouTube The Pen: This is why delivery systems matter. For years, peptide therapy relied on lyophilized vials, manual reconstitution, dilution calculations, and insulin syringes. Every step introduced variables, dosing inaccuracies, contamination risk, peptide I've been getting a lot of questions about GHK Cu, so here's a quick breakdown. GHK Cu is a copper peptide that naturally occurs in the body and plays a role in skin repair The Glow Peptide Protocol: Enhance Your Skin's Vitality And Radiance