IGF 1 LR3 Injection Thaiger Pharma, Strength: 100 mcg at 7500 box in New Delhi IGF 1 LR3 and Penis Enlargement: What the Evidence Actually Shows IGF 1 LR3 Dosage Guide: Benefits, Timing, and Results i313 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, IGF 1 LR3 tells your muscle cells to grow, repair, and absorb nutrients better. It works directly at the muscle level to help you build lean muscle and recover faster.What it is IGF 1