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, IGF1 LR3 Peptide Anderson Longevity Clinic IGF 1 LR3 vs HGH: Which Growth Enhancer Is Better? Swolverine Igf lr3 dosage frequency on training vs rest days IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society