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 Frontiers Sheep recombinant IGF 1 promotes organ specific growth in fetal sheep Recombinant Human LR3 IGF 1(E51R) Protein IGF 1, the Cross Road of the Nutritional, Inflammatory and Hormonal Pathways to Frailty Organ weights in response to Long R3 insulin like growth factor 1 (LR3 Download Scientific Diagram