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 LR3 PRAMAH THE HAVEN IGF 1 Facilitates Cartilage Reconstruction by Regulating PI3K AKT, MAP JIR Dove Medical Press IGF 1 LR3 Injection Benefits And How It Works The HCG Institute IGF 1: Miracle Hormone or Health Hazard? Diet vs Disease