Wellness peptide craze: why people are injecting drugs 'not for human consumption' GHK Cu is the compound your body made at 25 and quietly stopped making. Most people find it in overpriced serums. Few understand what it actually does, or what happens when you're not 6 month GHK CU check in Main takeaway: skin transformation takes time. GHK CU peptide binds to copper and activates genes involved in wound healing, collagen synthesis, and skin remodeling. On the face, this translates GHK Cu Copper Peptides: Topical vs Injectable GHK Cu Copper Peptide Cream (Prescription) UluRx