CJC 1295 + Ipamorelin vs IGF 1 LR3 for Muscle Growth IGF 1 LR3 forces receptor desensitization in 4 6 weeks, requiring months off before you can use it again. CJC 1295 and Ipamorelin amplify your natural Normal Physiology of Growth Hormone in Normal Adults Endotext NCBI Bookshelf Frontiers Growth hormone insulin like growth factor I axis in health and disease states: an update on the role of intra portal insulin Insulin like growth factor 1 promotes cell cycle progression via upregulation of cyclin D1 expression through the phosphatidylinositol 3 kinase nuclear factor B signaling pathway in FRTL thyroid cells Acta Pharmacologica Sinica Insulin like growth factor 1 stimulates retinal cell proliferation via activation of multiple signaling pathways ScienceDirect