GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration GHK Cu (copper peptide) is a science backed anti aging compound that supports collagen production, skin regeneration, and overall skin health. Used in both topical serums and subcutaneous Cellular Glow Copper Peptide GHK Cu Serum for Face Unlock the secret to ageless skin and cellular rejuvenation with GHK CU peptide! Often referred to as the "holy grail" of skincare, GHK CU is a naturally occurring copper peptide that works wonders