IGF 1 LR3 + MASS Cycle = CRAZY Growth? #askDave What is IGF 1 LR3?, Insulin Like Growth Factor 1 Long R3 (IGF 1 LR3) is a modified version of IGF 1 with a longer half life, making it significantly more potent and effective for muscle growth, Pediatric Implications of Normal Insulin GH IGF Axis Physiology Endotext NCBI Bookshelf GH and IGF1 in cancer therapy resistance in: Endocrine Related Cancer Volume 30 Issue 9 (2023) Insulin like growth factor 1 deficiency and metabolic syndrome Journal of Translational Medicine Springer Nature Link GHRH stimulated pituitary small extracellular vesicles inhibit hepatocyte proliferation and IGF 1 expression by its cargo miR 375 3p Journal of Nanobiotechnology Springer Nature Link