IGF 1 LR3 The Muscle Building Peptide Everyone's Talking About IGF 1 LR3 is one of the most powerful performance peptides used for muscle growth, recovery, and fat loss. It's a modified version IGF = the most misunderstood underrated mechanism of growth. , Get it maxed out within a specific phase for a period of time, youll grow substantially. Late life targeting of the IGF 1 receptor improves healthspan and lifespan in female mice Nature Communications IGF1 LR3 Peptide Anderson Longevity Clinic A Medical Review of IGF 1 LR3 Dosage, Side Effects and Safety Aspects