Let's talk about GHKU CU GHK Cu: The Regenerative Glow Peptide GHK Cu (Copper Peptide) is a naturally occurring peptide in your body that plays a powerful role in cellular repair, skin Beyond Hunger: The Structure, Signaling, and Systemic Roles of Ghrelin Feedback regulation of growth hormone synthesis and secretion in fish and the emerging concept of intrapituitary feedback loop ScienceDirect GHK Cu longevity peptide. Your body makes it. Peaks at 20. Down 60% by 60. 50 years of research says it: Modulates 4,000+ genes toward younger expression Regenerates bone and connective tissue