A Medical Review of IGF 1 LR3 Dosage, Side Effects and Safety Aspects IGF1 LR3 is my favorite short term used peptide for repair, fat loss and muscle gain. It commonly helps patients gain muscle quickly while losing fat. It is my favorite peptide for repair especially IGF 1 LR3 The Muscle Building Peptide Everyone's Talking About IGF 1 LR3 is one of the most powerful performance peptides used for muscle growth, recovery, and fat loss. It's a modified version IGF 1 LR 3 PRAMAH THE HAVEN