Huma Peptide IGF 1 LR3 Lean Muscle Growth & Recovery IGF 1 LR3 The Muscle Building Peptide Everyone's Talking About IGF 1 LR3 is one of the most powerful performance peptides used for muscle growth, recovery, and fat loss. It's a modified version IGF 1 LR3 The Muscle Building Peptide Everyone's Talking About IGF 1 LR3 is one of the most powerful performance peptides used for muscle growth, recovery, and fat loss. It's a modified version IGF 1LR3 Endothelial IGF 1R deficiency disrupts microvascular homeostasis, impairing skeletal muscle perfusion and endurance: implications for age related sarcopenia GeroScience Springer Nature Link Igf 1 LR 3 Enhanced Pharmaceuticals