Recombinant Human LR3 IGF I IGF 1 GMP Protein, CF 8335D GMP: R&D Systems 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 How HGH Works: Boosting IGF 1 for Muscle Growth Yizhe Wang posted on the topic LinkedIn Localized Igf 1 transgene expression sustains hypertrophy and regeneration in senescent skeletal muscle Nature Genetics The mighty protein: insulin like growth factor type 1 The Physiological Society The mighty protein: insulin like growth factor type 1 The Physiological Society