IGF 1 LR3 For Sale Receptor Grade Recombinant USA Made QK041 Recombinant human bovine porcine IGF 1 LR3 protein IGF 1 LR3 Ultra Labs This Peptide Is Next Level for Growth & Recovery Meet IGF LR3 the long acting insulin like growth factor that researchers can't stop talking about. From muscle growth to cellular repair , IGF 1 LR3 (Insulin like Growth Factor 1 Long R3) is often called the "Holy Grail" of muscle building peptides because of its potent anabolic effects. In a Med Spa context, it is typically sought out