IGF 1 LR3 tells your muscle cells to grow, repair, and absorb nutrients better. It works directly at the muscle level to help you build lean muscle and recover faster.What it is IGF 1 HGH vs IGF 1 LR3: Scientific Comparison & Research Guide Human LR3IGF 1 Rapid ELISA Assay BEK 2233 2P Insulin like growth factor 1 stimulates retinal cell proliferation via activation of multiple signaling pathways ScienceDirect Attenuated glucose stimulated insulin secretion during an acute IGF 1 LR3 infusion into fetal sheep does not persist in isolated islets Journal of Developmental Origins of Health and Disease Cambridge Core Oleanolic Acid Slows Down Aging Through IGF 1 Affecting the PI3K AKT mTOR Signaling Pathway