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 + Human conditions of insulin like growth factor I (IGF I) deficiency Journal of Translational Medicine Springer Nature Link Growth Hormone (GH) Maternal Pituitary Support Sheehan's Syndrome, Lymphocytic Hypophysitis Targeting growth hormone function: strategies and therapeutic applications Signal Transduction and Targeted Therapy Mechanisms of Disease: metabolic effects of growth hormone and insulin like growth factor 1 Nature Reviews Endocrinology Growth Hormone and Aging Endotext NCBI Bookshelf