Mechanisms of IGF 1 Mediated Regulation of Skeletal Muscle Hypertrophy and Atrophy Mechanisms of IGF 1 Mediated Regulation of Skeletal Muscle Hypertrophy and Atrophy IGF LR3 Natural Med Doc IGF 1 LR3 1mg Research Vial Long Acting IGF 1 LiveWell IGF 1 LR3 Muscle Growth & Performance The Biohacker IGF 1 LR3 tells your muscle cells to grow, repair, and absorb nutrients better. It works directly at the muscle level to help you build lean muscle and recover faster.What it is IGF 1