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 LR3 Before and After: Results, Benefits and Timeline IGF 1 33mg Lozenges IGF 1 LR3 Peptide Review: Dosage, Results & Potential Risks 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 Mechanisms of IGF 1 Mediated Regulation of Skeletal Muscle Hypertrophy and Atrophy