IGF 1 LR3 in Aesthetic and Anti Aging Medicine: Benefits and Risks Hubmed IGF 1 LR3 for Fetal Growth Restriction Children's Hospital Colorado LONG R IGF I IGF 1 LR3 1 mg VPeptide IGF 1 LR3 Canada: Ultra Pure Peptide for Growth, Muscle, & Cellular Signaling Research IGF 1 LR3 (Insulin like Growth Factor 1 Long R3) is often called the "Holy Grail" of muscle building peptides because of its potent anabolic effects. In a Med Spa context, it is typically sought out