IGF 1 LR3 Injection Benefits And How It Works The HCG Institute 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 LR3 IGF 1 (Human), Recombinant Protein, CHO, Tag Free Overexpression of Igf2 derived Mir483 inhibits Igf1 expression and leads to developmental growth restriction and metabolic dysfunction in mice ScienceDirect Localized Igf 1 transgene expression sustains hypertrophy and regeneration in senescent skeletal muscle Nature Genetics IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society