IGFORCE (IGF 1 LR3) 1 mg x 5 vials Syntex Pharma i313 RUO Recombinant Human IGF 1 LR3 Protein 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 Organ weights in response to Long R3 insulin like growth factor 1 (LR3 Download Scientific Diagram HGH vs IGF 1 LR3: Scientific Comparison & Research Guide