GHK Cu and Erectile Dysfunction: What the Evidence Actually Shows Dimeric copper peptide incorporated hydrogel for promoting diabetic wound healing Nature Communications GHK Cu Youthful Skin, Healthy Cells, Vibrant You. GHK Cu (Copper Peptide) is a naturally occurring peptide in the body that binds with copper to support cell repair and renewal. As we age, our levels decrease and thats where supplementation or