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, IGF1 LR3 is my favorite short term used peptide for repair, fat loss and muscle gain. It commonly helps patients gain muscle quickly while losing fat. It is my favorite peptide for repair especially IGF 1 LR3 vs HGH: Which Growth Enhancer Is Better? Swolverine IGF 1 LR3 Superior Peptide