A Medical Review of IGF 1 LR3 Dosage, Side Effects and Safety Aspects RUO Recombinant Human IGF 1 LR3 Protein Top 10 Benefits of IGF 1 LR3 for Men Wittmer Rejuvenation Clinic Theres a lot of confusion around peptides and muscle., Heres how I actually think about it., Most peptides dont build muscle directly., They improve the systems that allow muscle to grow., First, IGF 1 DES: Dosage, Benefits, and Comparison with IGF 1 LR3 i313 QK041 Recombinant human bovine porcine IGF 1 LR3 protein