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 IGF 1 LR3 Dosage Protocol for Enhanced Bodybuilding Performance The Peptide Report Application and benefits of IGF 1 LR3_Chemicalbook Receptor Grade IGF 1 LR3 for Sale (100mcg) Core Peptides The mighty protein: insulin like growth factor type 1 The Physiological Society