A Medical Review of IGF 1 LR3 Dosage, Side Effects and Safety Aspects 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, Longitudinal infusion of a complex of insulin like growth factor I and IGF binding protein 3 in five preterm infants: pharmacokinetics and short term safety Pediatric Research IGF 1: Miracle Hormone or Health Hazard? Diet vs Disease Buy IGF 1 LR3 UK Long R3 IGF 1 1mg UK Peptide Lab