Localized Igf 1 transgene expression sustains hypertrophy and regeneration in senescent skeletal muscle Nature Genetics Gut microbiota induce IGF 1 and promote bone formation and growth PNAS 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 How HGH Works: Boosting IGF 1 for Muscle Growth Yizhe Wang posted on the topic LinkedIn The role of insulin like growth factor 1 in bone remodeling: A review ScienceDirect