IGF 1 LR3 DOSES FOR MASSIVE GROWTH! #askDave 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 IGF1 LR3 Peptide Anderson Longevity Clinic My IGF 1 Level On 3 IU Of Pharma Grade GH Blood Test Results What is IGF 1 LR3?, Insulin Like Growth Factor 1 Long R3 (IGF 1 LR3) is a modified version of IGF 1 with a longer half life, making it significantly more potent and effective for muscle growth,