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, IGF1 LR3 Peptide Review: Benefits, Before & After, Dose, & More IGF 1LR3 IGF 1: Testing, Optimal Levels, and How to Improve Naturally & Clinica Revolution Health & Wellness How HGH Works: Boosting IGF 1 for Muscle Growth Yizhe Wang posted on the topic LinkedIn