The GH IGF 1 axis in obesity: pathophysiology and therapeutic considerations Nature Reviews Endocrinology Everyone's calling GHK Cu a miracle peptide But let's separate marketing from mechanism. GHK Cu isn't magic. It's a signal. A signal that: Supports tissue repair Modulates inflammation Enhances collagen + By age 30, your skin produces about 25% less collagen. By 40, that number can reach 40%. This decline affects more than just how your skin looks. It changes how it heals, GHK vs GHK Cu Without Copper, Basic Peptide Neurogan Health A) Serum levels of growth hormone (GH) and (B) insulin like growth Download Scientific Diagram