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 Frontiers Dual Characters of GH IGF1 Signaling Pathways in Radiotherapy and Post radiotherapy Repair of Cancers Insulin like growth factor 1 stimulates retinal cell proliferation via activation of multiple signaling pathways ScienceDirect Full article: Challenges of insulin like growth factor 1 testing