QK041 Recombinant human bovine porcine IGF 1 LR3 protein IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society Follow for more info on how to optimize your body. IGF 1 LR3 is one of the most misunderstood compounds in the entire space. People either treat it like a magic shortcut or HGH vs IGF 1 LR3: Scientific Comparison & Research Guide Late life targeting of the IGF 1 receptor improves healthspan and lifespan in female mice Nature Communications