IGF 1 LR3: Dosage Results and Safety Guide Vita Bella Health How to take Long R3 IGF 1 to get optimal muscle gains the science, the receptors, the strategy that got me to go from 289lb to 309 (20lbs) in 20 days! If you IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society Theres a lot of confusion around peptides and muscle., Heres how I actually think about it., Most peptides dont build muscle directly., They improve the systems that allow muscle to grow., First,