Injecting IGF1 LR3 directly into the muscle your training : r nattyorjuice Recombinant Human LR3 IGF 1(E51R) Protein IGF1 LR3 Reconstitution. This is just what works for me., #fyp #peptides #gymrat #fitnesstips IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society Insulin like growth factor 1 stimulates retinal cell proliferation via activation of multiple signaling pathways ScienceDirect