IGF 1 LR3 Injection Benefits And How It Works The HCG Institute Muscle Growth Montreal Peptides Canada (PC) What is IGF 1 LR3?, Insulin Like Growth Factor 1 Long R3 (IGF 1 LR3) is a modified version of IGF 1 with a longer half life, making it significantly more potent and effective for muscle growth, IGF 1 LR3 vs HGH: Which Growth Enhancer Is Better? Switched things up and have been using my IGF 1 LR3 30 mins pre workout and have been noticing longer lasting pumps and more vascularity so far! 2 more weeks until I cycle DopeRX IGF 1 LR3 at Attractive Prices Top Peptide for Muscle Growth