IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society Human Recombinant IGF I LR3, ACF STEMCELL Technologies Explanation, Benefits, and Dosing for IGF LR3 Wittmer Rejuvenation Clinic 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, Igf lr3 dosage frequency on training vs rest days