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 Effect of 6 weeks of treatment on serum IGF 1. Red bars represent Download Scientific Diagram IGF 1 & LR3 (Build Blend) Peptide Therapies Elite Health HRT Super Pharma IGF 1 LR3 Ultimate Muscle Growth Accelerator What is IGF 1 LR3?, Insulin Like Growth Factor 1 Long R3 (IGF 1 LR3) is a modified version of IGF 1 with a longer half life, making it significantly more potent and effective for muscle growth,