GHK CU Peptide for Skin Rejuvenation Wittmer Rejuvenation Clinic 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 Microneedling to tighten loose skin around waist after weight loss: is the tightness permanent? : r Microneedling 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