IGF1 LR3 Peptide Review: Benefits, Before & After, Dose, & More IGF 1 LR3: Dosage Results and Safety Guide Vita Bella Health IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society IGF LR3 is a peptide that play a role in muscle growth, tissue repair and recovery. But like all peptide therapies, it's not one size fits all. We focus on using peptides thoughtfully and in the Organ weights in response to Long R3 insulin like growth factor 1 (LR3 Download Scientific Diagram