HGH vs IGF 1 LR3: Scientific Comparison & Research Guide Pediatric Implications of Normal Insulin GH IGF Axis Physiology Endotext NCBI Bookshelf 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 Insulin like growth factor 1 stimulates retinal cell proliferation via activation of multiple signaling pathways ScienceDirect Mechanisms of putative IGF I receptor resistance in active acromegaly ScienceDirect 5 Powerful Benefits (and Risks) of the IGF 1 LR3 and Hexarelin Stracuzzi Wellness