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 + Growth Hormone and IGF 1 Actions in the Brain and Neuropsychiatric Diseases Physiology American Physiological Society Role of IGF 1 in the Growth Hormone IGF Axis Frontiers Growth hormone insulin like growth factor I axis in health and disease states: an update on the role of intra portal insulin Rigid flexible nanocarriers loaded with active peptides for antioxidant and anti inflammatory applications in skin ScienceDirect