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 Results and Safety Guide Vita Bella Health IGF1 LR3 Peptide Anderson Longevity Clinic 5 Powerful Benefits (and Risks) of the IGF 1 LR3 and Hexarelin Stracuzzi Wellness A Medical Review of IGF 1 LR3 Dosage, Side Effects and Safety Aspects