Receptor Grade IGF 1 LR3 1MG Raw Amino IGF 1 inhibits inflammation and accelerates angiogenesis via Ras PI3K IKK NF B signaling pathways to promote wound healing ScienceDirect 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 IGF 1 LR3 Dosage Protocol for Enhanced Bodybuilding Performance The Peptide Report Recombinant Human LR3 IGF I IGF 1 GMP Protein, CF 8335D GMP: R&D Systems