Pediatric Implications of Normal Insulin GH IGF Axis Physiology Endotext NCBI Bookshelf GHK Cu by InfiniWell Charny Healing Figure 1. [Physiology of the GH IGF I Axis]. Endotext NCBI Bookshelf The GH IGF 1 axis in ageing and longevity Nature Reviews Endocrinology 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 Why do I check IGF 1 levels during peptide therapy?, Because peptides like CJC 1295 + Ipamorelin boost your bodys own growth hormone and IGF 1 is how we measure its regenerative impact., IGF 1