IGF 1 LR3 The Muscle Building Peptide Everyones Talking About , IGF 1 LR3 is one of the most powerful performance peptides used for muscle growth, recovery, and fat loss. Its a modified version Insulin like growth factor 1 attenuates oxidative stress induced hepatocyte premature senescence in liver fibrogenesis via regulating nuclear p53progerin interaction Cell Death & Disease MECHA FACTO ( PEG MGF): Promote Muscle Growth, Tissue Repair, Collagen onestop.fit Frontiers Regulation of IGF 1 signaling by microRNAs IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society