GHK-Cu: collagen and copper

GHK-Cu is copper bound to the plasma tripeptide Gly-His-Lys. It carries copper to lysyl oxidase, the enzyme that cross-links collagen and elastin, and to antioxidant enzymes. It makes fibroblasts build collagen and matrix, and shifts thousands of genes toward repair. It is the largest part of the blend and gives the blue colour.