IGF 1 LR3 1000mcg EuroPeptides IGF 1 LR3 1MG Research Peptide Laboratory Study IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society IGF1 LR3 Peptide Anderson Longevity Clinic Role of insulin like growth factor 1 receptor signalling in cancer British Journal of Cancer Activation of insulin like growth factor 1 receptor (IGF 1R) promotes growth of colorectal cancer through triggering the MEX3A mediated degradation of RIG I ScienceDirect