Frontiers Sheep recombinant IGF 1 promotes organ specific growth in fetal sheep What Are the Best Peptides for Muscle Growth? Emerging Anabolic and Regenerative Peptides in Athletic Body Re composition and Bodybuilding: Mechanisms of Action, Dosing Strategies, and Evidence Review Eat These Foods to Increase Glutathione in Your Body Vitality Medical Wellness Center There's a lot of confusion around peptides and muscle. Here's how I actually think about it. Most peptides don't build muscle directly. They improve the systems that allow muscle to grow. First, Peptides: performance boosting, anti ageing drugs or dangerous snake oil?