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, Frontiers Links Between Testosterone, Oestrogen, and the Growth Hormone Insulin Like Growth Factor Axis and Resistance Exercise Muscle Adaptations Insulin Like Growth Factor 1 (IGF 1) and Its Monitoring in Medical Diagnostic and in Sports IGF 1 LR3 Dosage Guide: Benefits, Timing, and Results i313 The Science Behind IGF 1 LR3: What The Studies Show UK SARMs