Follistatin 344 works by binding to and inhibiting myostatin the genetic limit switch that restricts how much muscle somebody can build. When you reduce myostatin, you create an environment where: Muscle IGF 1, the Cross Road of the Nutritional, Inflammatory and Hormonal Pathways to Frailty Insulin Like Growth Factor 1 (IGF 1) and Its Monitoring in Medical Diagnostic and in Sports muscle hardness (dense, dry, grainy look), you want peptides that improve GH release, IGF 1 activity, recovery, and nutrient partitioningnot just bulk size., Here are the 3 best peptides for muscle IGF 1 LR3 Peptide for Muscle Growth Ageless Vitality Peptides