Insulin like growth factor 1 stimulates retinal cell proliferation via activation of multiple signaling pathways ScienceDirect Late life targeting of the IGF 1 receptor improves healthspan and lifespan in female mice Nature Communications 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 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society QK041 Recombinant human bovine porcine IGF 1 LR3 protein Most people think all peptides = fat loss., Thats not even close., IGF 1 LR3 isnt about burning tissue its about building it., This is the signal that tells muscle fibers to:, Recover faster,