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 (Build Blend) Peptide Therapies Elite Health HRT Igf 1 LR 3 Enhanced Pharmaceuticals Late life targeting of the IGF 1 receptor improves healthspan and lifespan in female mice Nature Communications IGF 1 LR3 + MASS Cycle = CRAZY Growth? #askDave YouTube