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 Bella IGF 1 LR3: Your Growth Optimized Ally Looking to enhance muscle growth, recovery, and fat metabolism? IGF 1 LR3 is a powerful peptide known for: Promoting lean muscle mass Attenuated glucose stimulated insulin secretion during an acute IGF 1 LR3 infusion into fetal sheep does not persist in isolated islets Journal of Developmental Origins of Health and Disease Cambridge Core IGF 1 LR3 (1MG) Pure Bio Labs