Most people think GHK Cu is just a beauty peptide. But look at this Same person. Same lighting. Real skin change. GHK Cu works by activating repair genes in the body helping with Pediatric Implications of Normal Insulin GH IGF Axis Physiology Endotext NCBI Bookshelf Is IGF 1 a Steroid? Understanding Its Role Hormone Replacement Therapy Exploring the Therapeutic Potential of Targeting GH and IGF 1 in the Management of Obesity: Insights from the Interplay between These Hormones and Metabolism