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 1: Miracle Hormone or Health Hazard? Diet vs Disease 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 HGH: THE IGF 1 INSULIN AXIS IS A TRUE DR. JEKYLL AND MR. HYDE ON ONES' HEALTH PUR FORM IGF1 LR3 1mg OP Labs (Formerly Oxford Peptides)