Mechanisms of IGF 1 Mediated Regulation of Skeletal Muscle Hypertrophy and Atrophy IGF 1 LR3 Peptide Affect LR3 IGF 1 (Human), Recombinant Protein, CHO, Tag Free IGF1 LR3 Peptide Anderson Longevity Clinic Effect of 6 weeks of treatment on serum IGF 1. Red bars represent Download Scientific Diagram 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